How would any girl, Swedish or not, know most men act? Even if she worked at a bordello, servicing several customers a day - in the process, "knowing" thousands of customers, all she'd know is how bordello customers act. I trust the average woman doesn't go through thousands of men, and couldn't possibly know that a majority of men are sleazes let alone the majority of powerful men. Please don't project your hero's weaknesses onto other people.
You are full of baloney. Anyone who works at the reception desk of a hotel knows who the “regulars” are and who they are “seeing.” Anyone who works in a smart restaurant knows who comes and goes and how “friendly” they are with their escort. Etc. Etc. Etc. there are numerous professions that allow people to regard others in what may or may not be compromising circumstances. One doesn’t have to work in a bordello.