vagrowave

Noun: a vagina being used for the sole purpose of keeping a penis warm/ warming up a penis
Does not count as sex, even though thrusting is allowed while using a vagrowave
Experts have decided that this does not count as loss of virginity/sexual activity,

*Guy 1* "bro did you fuck my sister? "
*guy 2* "whoa of course not. I just used her vagrowave"