one time this situation happened with me, I just gave a light slap on the person hand. I was really surprised the person did that, because i was just joking about it. Clark is holding lois hand very dearly and then he takes it off his face and ask her to stab him seems very flirty to me. and later on bus he really likes to hold her hands.
superman is a big jerk than batman, orion or steve. and for sure wonder woman won't have self love