It depends on what it is and how old the child is.
While I'm not a free spirit by any means, I do think the whole taboo thing surrounding sex is weird. I'm not going to purposely shield my son from something, but depending on what it is, I won't seek it out either. For example, if for some reason we were walking downtown and a pride event was going on, I wouldn't be horrified to see what amounts to a kinky Village People cosplay going on. Chances are my son wouldn't even know what was going on at the time. If he was older and had questions, I'd answer them and probably work something in about "if two consenting adults want to do that, more power to them".
Really, I think just before the age of puberity is probably a good time to start pointing out sexualized stuff, especially when it's in the media. I fully believe it's the parent's job (not the school's) to teach that sort of stuff and I want my kid growing up in a sex positive house where he doesn't need to sneak around. When a household is sex negative, that's when teen pregancies happen and I'll be damned if I'm raising another kid. But I mean you're roughly the same age as me, I'm sure you were exposed to sexualized stuff or even downright porn when you were between 7-10 years old. Kids now have access to the internet on everything, chances are they're going to see it earlier than millenials would've.