I sort of get your last point, although I can't imagine how it'd work the other way.

Lets say for example I decided to be a primary school teacher/kindergarten - something that is probably about the oposite of 'tech' in terms of males/females. I would be a complete outsider. It's quite likely I'd be the only male teacher in the school. Lets then say maybe the women do a staff presentation about the kids that includes makeup or lingerie as a metaphor. Would I be insulted? I don't think so at all. Is this a good analogy? I don't know. I just can't think of many situations where men can get offended and claim 'sexism'.