Occasionally you see a non hard penis, occasionally even a semi (or just a big one not hard), but I don't think I've even seen a dude with a boner showing outside porn. I have seen plenty of women's parts though, not often truly explicit, but it's not that unusual to see that whole area fairly clearly.
It's rare to see that part of a man on film and have it being remotely sexual, one of the only times I can think of is in the Sex and the City movie, Samantha is perving on some dude showering, you see him fully naked from behind and then he turns around and you can most definitely see a decent sized cock. Not hard and not fully showing, but showing enough. But that whole series is based on empowering women and women having sex in the same way guys have sex, so maybe that's why they put the cock shot in there, to turn the tables round a bit.
I'm not one who likes seeing random dudes penis's, I hate seeing them on twitter, I don't watch cams, the idea of it actually repulses me. But... When it's on a film and it's a really attractive dude, like in the case of Sex and the City, I most definitely didn't mind seeing that penis! I also wouldn't mind seeing a little more penis, though only on attractive guys. I mean it's not like you ever see some really ugly elderly woman in a sex scene showing off all her lady parts.
I'm not saying that guys should all be showing boners, but if women are going to be portrayed so graphically then I think men should also have their share of skin showing. For most women porn just doesn't do it for them, and though there are some girls who get as turned on by looking at other women, if not more, it's not the large percent of the population. I mean when I watch porn, I look at the girl even though I'm only semi into girls, why do I look at the girl? Because the guy isn't looking remotely sexy. I don't even find porn much of a turn on anymore, it got old quickly. If there were shows where the guys were sexy and showing their fair share of skin, but not only that as he'd be in the show his character would be built up etc, that would be like porn for me. It'd actually make me more interested and attracted to the male sex as a whole.
Most of the time I watch tv the girls are the sexy ones and the dudes are just sexless beings, except the odd occasion when a dude has a LOT of charisma. I wouldn't mind that changing. I mean women aren't going to stop being portrayed as sex objects anytime soon, might as well make it equal and do the same to dudes.