I like many things I don't feel comfortable discussing here!
I used to borrow my ex's shirt, I like some 'male' clothes, like fitted blazers etc. I can find what I like in a woman's version which accounts for my chest so I don't buy men's clothing per se.
I think, a man who enjoys wearing stockings is just that- nothing said about sexuality or anything else. I consider myself 'A woman who enjoys (insert something 'naughty' here)' but it doesn't mean I automatically label myself as a 'something'. I like what I like, and that's all there is to it. Maybe it's related to being bi- I used to think, I like women so I must be gay, but I like men so I must be straight, does not compute, arrgghh! Then I thought, I'm just me and I like what I like.
So, in reply, I don't think a man liking to wear women's underwear/hosiery is therefore a transvestite or transgender person; he could be, but one does not equal the other, at face value it's just a man liking to wear women's underwear.