[ Kozakura is a delicate little flower. If she really wound up she could absolutely hurt herself on this athletic beast's abs, but she has experience enough to avoid doing just that. ]

Listen, lots of people do fun things in stupid ways.

[ Speaking from experience with that too. ]

I'll tell this advice to some of them too, but sometimes you have to learn to be the one to slow things down, even if it spoils the other person's mood a little.

[ Look at her getting hard too. ]

Which doesn't mean you need to stop, but you need to ease into it more carefully so they can actually walk to class the next day!