That's Clark's attempt to lighten the mood when he's trying to ask Lois out on a date in "The Phoenix"
Okay, how about this one:
"You were an itch. You've been scratched."
Pel
Such a little thing really, a kiss...most people don't give it a moment's consideration. They kiss on meeting, they kiss on parting, that simple touching of flesh is taken entirely for granted as a basic human right.