Some people, sadly, let power go to their heads, and power corrupts.
It's a human thing, and a weakness that can be found in any political organisation, or any power hierarchy.
I knew a bloke once who thought that because he was a boss (not a big boss, but a boss) he was entitled to, among other things, maul female employees. He had no idea that (apart from anything else) it made him look like a ****.
He also had quite appallingly sexist attitudes. One day he said the wrong thing to the wrong woman. It was a really stupid thing to say, and he was probably too thick to realise how offensive it was. She put it through the formal disciplinary process, he was suspended, and then - he left. (He found another organisation daft enough to give him a job.)
Knowing what arrogant cretins some MPs are, no one will persuade me stuff like this does not go on in Parliament. Some women tolerate it. Others even exploit it to their own advantage. (I've known that in my time too.) Some are annoyed, but just steer clear. But there are some women who won't be messed with and get the matter sorted. Good for them, that's how it should be.