Still looking for the best way to simulate sex/oral sex with DIY auto blowjob devices?

Below are the top 5 currently recognized DIY methods for simulating oral sex and automatic suction, each with a super detailed step-by-step tutorial (materials, tools, and precautions are all disclosed). You can do it yourself after reading, but you’ll also understand that DIY is just the beginning. What will truly make you feel realistic and weak in the knees is the automatic vaginal suction, vacuum oral cavity, and heating upgrades of a professional sex doll.

Top 5 DIY Auto Blow / Oral Simulation Complete Production Guide

1. Bottle + Sponge + Vacuum Pump Basic Version (Most classic entry-level, 10 minutes to complete)

Materials: Plastic drink bottle of capacity 500ml-1L, sponge or dish sponge, bicycle air pump (for reverse pump action), tape,

Production Steps:

• Now, cut off the bottle at the bottom and use the bottle opening as the entrance.
• Cut the sponge into a cylindrical form, then put it inside the bottle, creating a channel of about 3-4cm in diameter in the middle part of it, referred to as the ‘oral cavity’.
• Several strips of tape can be wrapped around the exterior of the sponge retaining it in place.
• Make a small hole in the side of the bottle and attach the nozzle from the air pump and secure it tightly with some tape.
• Use lubricant → When in use, reverse the air pump in creating a vacuum suction.

Effect: Basic suction sensation, adjustable intensity.

Disadvantages: Noisy, prone to air leaks, and no temperature.

2. Fruit + Straw Fruit Deep Throat Version (Most soft and realistic to eat in 5 minutes)

Materials: Medium-sized watermelon or banana, thick straw/tube, knife, and lubricant.

Production Steps:

Cut 1/3 of the watermelon horizontally to use as the “head” part. Hollow out the middle part of the watermelon to create a channel ranging from 15-18cm deep. For bananas, extract the peels and hollow out.

Note: Spray a uniform layer of lubricant inside the channel to make it easier.

Optional: 

• Insert a few soft straws at the entrance of the channel to simulate “tongue” texture.
• Preheat the fruit to room temperature or microwave it for 10 seconds to enhance the temperature sensation.
• Insert directly when using; the fruit pulp will naturally wrap around.

Effect: Super moist + soft, like a real deep throat. 

Disadvantages: Disposable, single-use, significant hygiene risks.

3. Electrical Toothbrush + Sleeve Vibration Suction Version-(with vibration feedback, 15 minutes to assemble)

Supplies: Old electric toothbrush, silicone masturbator/thick condom, sponge, tape, small vacuum cup (optional).

Instructions:

• Remove the electric toothbrush head and retain the vibration motor part.
• Put the silicone sleeve on the vibration rod, or condom on, and tape it into place.
• Insert a sponge outside to enhance thickness and softness, then use a vacuum cup or bottle for the outside shell.
• On its side, leave a hole for the vibration switch. At the bottom, leave an air hole if you want to add in suction.
• Apply with lubricant, then turn on vibration plus manual suction for use.

Effect: Vibration + slight suction, double stimulation. Disadvantages: Vibration is too mechanical, battery runs out easily, wires get tangled.

4. 3D Printing + Small Pump Professional DIY Version (closest to reality, cost $100+)

Materials: 3D printer, oral STL model file, 12V miniature vacuum pump, silicone liner, tubing, and power supply.

Instructions:

• Download free oral mold STL files (search “oral mold” on Thingiverse).
• Print the outer shell + channel using flexible TPU material (or print with PLA and then line with silicone).
• Fix the miniature vacuum pump to the bottom of the outer shell, connecting the tubing to the channel.
• Brush the inner wall of the channel with medical-grade silicone or directly pour liquid silicone to cure (to increase realistic texture).
• Connect a 12V power supply + switch, and press the switch to create a continuous vacuum during use. 

Effect: Even suction, realistic texture, close to mid-range toys.

Disadvantages: Requires 3D printing technology, complex assembly, high cost.

5. Pillow + Vacuum Cleaner – Extreme Power Version (Caution advised! Only for illustration purposes)

Materials: Thick pillow, vacuum cleaner hose, sex toy or thick towel.

Instructions:

• Dig a channel 15 to 20cm deep on the side of the pillow.
• Place the sex toy or rolled-up towel inside the channel as a lining.
• Attach the vacuum cleaner hose to the other side of the channel and seal off any gaps with tape.
• Use plenty of lubricant and the vacuum on the lowest speed setting. A speed controller would be very valuable.
• Disassemble and clean immediately after use.

Effect: Extremely strong suction, incredibly pleasurable.

Disadvantages: Dangerous (skin may be injured by suction), noise is like a plane taking off, easily damages the vacuum cleaner.

The Pattern DIY Users All Notice Eventually

Across all five approaches, one truth stands out:

DIY methods test ideas — they don’t replace realism.

They may deliver:

• Suction
• Moisture
• Vibration

But they fail to deliver:

• Warmth
• Elastic response
• Natural movement
• Emotional immersion

That’s why most DIY users describe the experience as “interesting, but temporary.”

Why Do Sex Dolls Become the Natural Upgrade?

Are you still using DIY auto-blow methods to simulate oral sex, trying to capture that “deep throat embrace + vacuum suction” pleasure? Honestly, DIY is a great starting point – it allows you to explore your preferences and ignite your fantasies. But soon, you’ll discover the limitations of those bottles, sponges, or homemade pumps: unstable suction, cold temperature, rough materials, and they break after only a few uses, not to mention hygiene and noise concerns.

This is where sex dolls naturally become your upgrade of choice. They don’t simply imitate a feeling, but integrate all the senses, allowing you to switch from “experimental mode” to a state of “complete relaxation and immersion.”

High-quality oral sex dolls far surpass DIY in design:

• Soft inner wall texture responsive to pressure: Like a real tongue and throat wall, it’s soft and resilient with a gentle touch, providing a full sense of embrace, unlike the stiff or loose feel of DIY methods. Imagine feeling natural “compression feedback” with every thrust, instead of cold plastic.
• Consistent and controllable vacuum suction: Built-in adjustable pump or automatic mode provides even and lasting suction, without sudden leaks or interruptions. That “spine-tingling” sensation during orgasm is something DIY pumps can never simulate.
• Human body temperature simulation: Upgraded heating rods maintain a body temperature of 37℃, like holding a real person who has just woken up. Compared to room-temperature fruits or bottles used in DIY, the difference is night and day.
• Pulsating or contracting motion: Multi-speed vibration/automatic contraction functions simulate the rhythm of real swallowing, transforming the experience from “static” to “dynamic interaction. As the user explains: “Users often say: ‘With DIY, I’m doing all the work; with a sex doll, it feels like she’s responding to me.’”
• Long-lasting materials that are durable and easy to keep clean: Medical-grade TPE or silicone that is tear-resistance, antibacterial, and water-cleanable, with a lifespan of months or years.