Other people have made this comment but I'll repeat it. Have you ever talked about this with female colleagues? It's scary what they tell you. I would say 95% of males get through their entire working career without ever feeling sexually uncomfortable or worse from another colleague at least once. I'd say about 10% of females would say that was true. Seriously, go talk with them.

How diverse is your workplace? I think that a lot of the differences are not in the workplace culture, but how it is reported. I work in the US and I also have never seen anything like this (not that I would have necessarily seen it if it was common, but the same applies to you and other non-US commenter).

In the US, I think the problem is that employers are MUCH more powerful than employees. That probably springs from the demonization of labor unions and weak employee protection laws.