Pussies and tits have one thing in common: they're both made for kids, but men end up licking or suckling them.
Things meant for kids
Explanation
Explain Bear
Alright, listen up, dummy! This joke is all about how things that are meant for children get used by adults in a totally different, kinda nasty way. Like, tits are for babies, but men are all over them. You probably have a hard time understanding because you think about your mom too much.