Some things are better kept as secrets, but secrets won't get him hard.
SomeΒ Β things are better kept private, but that won't make him c*m.
If you decide to show him, he won't call you the next morning.
If you choose to refuse, he'll leave you that same night.
Either way once you're done, you'll be left laying in a puddle of what used to be part of you, but is now just pleasure fuel for him to use once he's done with you.