helmet diving 

The act of inserting one's penile helmet or the helmet of one's penis into the vaginal canal of a woman

Bobby and Gina decided it was a great time to go helmet diving.

helmet diving by JGammizle February 20, 2011

Diving helmet

The ancestor to both the gas mask and modern scuba diving gear.

I've never tried a diving helmet. But yes I've tried a gas mask.

Diving helmet by Uncle Dimma June 26, 2022

German Diving Helmet 

The German Diving Helmet is a sexual position in which one person inserts his/her head into a female’s vagina.

Gerald: Why does your head smell like fish?
Phil: Tonya let me do a German Diving Helmet last night. What a freak!

German Diving Helmet by Turnipgenocide June 15, 2018

Diving helmet

The ancestor of modern scuba diving equipment.

The diving helmet would have looked like a combination of a gas mask and a scuba diving mask.

Diving helmet by Uncle Dimma June 1, 2022

Tijuana diving helmet 

Sexy with a foley inserted in the penis

Dave did the Tijuana diving helmet with Amanda

Tijuana diving helmet by Chato357 March 22, 2025

Two Nuts Driving A Hot Rod Should Always Wear A Helmet 

use prophylactic protection prior to inserting the pork sword into the pudendum; when you descend down her blouse, suit up the trouser mouse; practice safe sex, said of a male.

In today's age of rampant sexual promiscuity, it's probably quite prudent to slap on a skin or two...two nuts driving a hot rod should always wear a helmet.

Two Nuts Driving A Hot Rod Should Always Wear A Helmet by weave March 24, 2003