My DH doesn't but I did once almost date a man who did and I know a lot of men who seriously seem to. It is a self defence thing, or an excuse, depending on the individual man.
A friend married a Kurt St Moritz type who had no shame, even taking his OW and their baby home to meet his mum, often. My friend acted in a way that told him his behaviour was fine - for a few years, then she dumped him. But he had always been like that, in his late 50s now he still is!
My own close shave was a single date, nothing other than a drink, a meal and a thank you. I was too young to think straight so I tried to let him down gently. In front of a lot of friends he explained that it was OK to fall in love with him very quickly, it had happened before. I shouldn't deny myself. I fell about laughing, as did the other women in the group. Some of the men were offended that we didn't see his point!
So yes, some men do indeed think that every woman is in love with them. The trick is to recognise them and run.