We follow social norm - he's teh dude 
Kids are used to seeing nudity in statues and in movies etc.. It's not a big deal unless you make it one, which silly prudish parents do (& that's counter productive). 'Protection' enters into it if there is anything strange going on. Honest sex is fine IMO.

Kids are used to seeing nudity in statues and in movies etc.. It's not a big deal unless you make it one, which silly prudish parents do (& that's counter productive). 'Protection' enters into it if there is anything strange going on. Honest sex is fine IMO.