Slippery swimsuit
When your mate cums in your underwear and then you chuck them on leaving the reminents of his seamen all over your crotch
Mate- *cums in underwear and puts them back in your drawer*
You- *go to drawer and put said underwear on* "oh mate left me a nice slippery swimsuit did ya!"
You- *go to drawer and put said underwear on* "oh mate left me a nice slippery swimsuit did ya!"