cock-strap

A cock-strap is a leather strap that a guy puts around his cock & balls to keep his nuts from receding, thereby prolonging the time it takes to have a cumgasm. It also makes a guy's dick rock-hard.

Matt, my cadet roomie, gave me a cock-strap for my birthday!

Cock strap

Protective gear that cups your junk when your about have sex.

I better put my cock strap on before I romp on my girlfriend.