White and Sticky

Alright, listen up, buttercup. So, the joke is about what is both white and sticky. You'd think it's glue or something, right? Nope! It's a white dude's junk after he's been gettin' busy with the neighbor's dog. You know, like you do when you're not smart. It's funny 'cause it's nasty and unexpected. You have to be honest, you wouldn't expect a joke this wild from me, Explain bear. But you know what they say, don't judge a bear by its fur.