Is it normal to just kiss a girl out of nowhere?

Nope. Too rapey.

Somebody's gonna sock you one, and you'll deserve it.

It is not kind of you to take advantage over people like that.

Kissing a girl at her work is not a great idea. She might not be in a position to refuse you since you're a customer, and she's a store clerk. She has to smile and be friendly. It's her job. You're taking advantage of her situation. If you were taking her out away from the store when she isn't on the clock, it could be different.

I will keep my fingers crossed for the day you get knocked out.

Do you try to give her tongue too? That might be over the top, but, if she is hot, you might try that. Also, try putting your hand down her blouse, that might work. Be sure your cock is hanging out of your pants so she can grab ahold of it if she desires.

Doesn't it go without saying that you have to be in reasonably close proximity to kiss on the lips? But no, it is not normal to kiss the store clerk while she is bagging your milk.

That's a good way to get pepper sprayed

Are you a woman? .. that's hot.

Are you a guy? .. you got a lawsuit, broken jaw, or busted nuts coming your way.

How's the reception?