Doing my laundry I could see quite graphically the difference between men's and women's underwear, to fit the same size bottom the ladies' use a lot less material, but it is much more carefully cut and generally of a nicer, lighter weight nature. Apart from any gender confusion or sexual complications I can clearly see why anyone would prefer female briefs to men's. There are of course some "erm" containment issues with some styles, but any dedicated pantie wearer will soon learn that most thongs and many other styles simply don't work. Boxers of course are a different question all together and I suppose it should all be about personal choice.
I understand that there are a lot of men who may well not identify as cross dressers or as trans in any way who choose to wear women's underwear. Over the years this has been a rich source of material to comedians ranging from bar room wags to Rick Mayall, I suspect the jokes have also been a rich source of angst to the wearers and a source of the disapproval of many civilians. Being aware of the number of men in particular who like to wear women's panties there have been several attempts to make something similar, but cut and aimed at men, somehow the results always seem to me to be somehow a little sordid (I think you can tell which are which in the pictures, which show what I mean)
I came across this article the other day and thought I would share it is it seems that many of us have an interest in this area.