No. Because your first mistake was calling it "naughty". When it's perfectly valid, acceptable and shouldn't be seen as out of the ordinary or somehow 'bad'. 😜
Sorry, it's a reference to being labeled a sex offender. If you have sex on the beach and a kid walks up to it, you can get in trouble for exposing to a minor. It's just risky.
Ah, thanks. We have never had sex on a beach nor do we know of anyone or anymany who has personally, guess that's why we haven't heard of it. That or that term isn't used where we reside.