INFO: Is this something you communicate to potential partners early in the relationship, before you actually have sex? If so, and they agree to this term, it's not controlling. It's just a preference that you're entitled to, as long as your partner understands what they're signing up for and wants to structure their relationship this way.

If you don't tell people how you feel about it before they have sex with you and then flip out afterward because they've told their friends they had sex with you, it makes you look not great. If you demand this NDA from someone who doesn't like the idea, that's not cool either. This is definitely a thing that you're allowed to ask for in the beginning and the other person is allowed to decline if they don't want to adhere to your standard.