
Not to suggest you should surprise a partner with it, but I likely wouldn’t notice until I got up in there unless the scar was a lot more noticeable than you’re describing.
Knowing about it would probably make me a little more hesitant about how I was playing with someone’s sack but it wouldn’t be a reason not to go to bed with a potential partner.
Obviously, asking on Lemmy has a bit of respondent error involved but I don’t think you should feel self-conscious about it.
Some religious and cultural beliefs prohibit or discourage it.
Beyond that, there’s no reason why someone having a period can’t have sex. It just might be messy.