It's the difference between "it happens" and "it's a systemic problem." Yes, men get sexually harassed sometimes. Women get sexually harassed all the time.
Bringing a guy with you when you go to tech conferences usually helps. Then it's clear that someone else has already called dibs. But it doesn't always work. Sometimes it just results in inappropriate things being directed at you both. Obviously my partner will not disagree with me on a technical topic because then "he won't get any tonight," according to a fellow developer (note: this is utter bull. he is quite ready to correct me on any technical matter where he has more expertise...which is most of them, since he's been at this since I was in elementary school).