ok but imagine tony making a bet with bruce that he can condition steve to kiss him whenever his phone goes off
so like, for the first few days, every time someone calls tony and steve’s within hearing range, tony leans in really quick and kisses him before taking a call.
after a week, steve starts automatically leaning in as soon as it starts to buzz.
after a month, tony’s two rooms away and pepper calls and before tony’s even picked up the phone steve’s in the room, kissing him breathless.
“what was that for?” tony asks when steve pulls away.
“i don’t know. just wanted to kiss you.”
tony grins. when steve turns away, bruce forks over a hundred dollar bill.