Granted, I myself wouldn't have worn a shirt like that, but that may be because I don't see much point in showing that I find females attractive that badly.
That being said,
take a look at this.
Why is there a double standard on this? If a woman chooses, of her own volition, to do something sexual, it's considered empowering, but if any male, even her own boyfriend/husband/friend-with-benefits appreciates it, it's sexist, and he should be raked over the coals.
Seriously, I think more people ought to call bullshit on the feminists who take it too far, like the ones who say it should be illegal to urinate while standing. I'm all for equality, but is it really equal when one side loses all their rights?
Granted, he shouldn't have worn the shirt in a professional environment, but claiming that it "alienates and ostracizes" half the population is a bit much. I've thought about either getting a tattoo or a painting on a guitar of a couple pin up girls. Most of the people I described it to were females, and not one said it was offensive; they all thought it was cool. Though two may not count, because one is a lesbian and the otheris bisexual.
Check out realsexism.com and ncfm.org, and you'll see what I meant when I said one side loses all their rights.
EDIT: Fixed the link. Sorry, not easy to copy and paste a url with a nook. I'd have poated from home, but I don't have internet there.