Genital Mate
The genital equivalent of a soulmate. When you meet a member of the opposite sex and as soon as your genitals touch for the first time, the clouds break, a ray of light shines upon your crotches, choirs of angels start to sing and the world around you begins to crumble.
“Dude, I banged this Colombian chick lately, I think I found my genital mate! The sex was out of this world and we both came like five times in a row, it was absolutely ridiculous!”