Thick, gooey ooze coats guys’ bodies and dicks, turning everything into a slick mess that clings to skin and drips off in strings. It usually gets used as living lube for fucking, fisting, or tentacle-style play, with lots of focus on gushing, pooling, and cum mixing into the goop. The vibe ranges from playful and slippery to full-on monster-sex domination where the goo actively restrains and penetrates.