Making out...

Does anyone just sit back and think about how weird kissing/making out is? Like why is it so sexy? what’s the point? That’s not how babies are made... why is it necessary? Why do we want each other’s private parts in each other’s mouths? What’s up with mouths being sexual? Lolol like a psychological/ scientific reason? And why aren’t lips sexualized like titties to where we have to cover it up?