COB is a slang term that refers to a male’s ejaculate that leaks from his penis as he ejaculates; his semen splashes and splatters all over his partner’s breasts, stomach, and hips.
Some men prefer COB because they prefer their cum to splash onto their partner’s body or spray out like a waterfall. You can do this with your girlfriend or with an escort.
COB can arise from vaginal sex, anal sex, handjobs, blowjobs, or boob fuck.