Nothing strange about it. I have a big thing for men wearing stockings/heels/womens clothes.
A man wearing just stockings would be quite nice, but for me, I'd rather see him with heels and maybe a suspender belt too! Thats me though. Think yourself lucky your girl would be happy with just stockings! Lol!
And its a big turn on for me. I love it. I think its more common than you would first think, but not every woman is in to it, or thought about it enough to have an opinion. Its not for artsy sake at all for me, it genuinly turns me on!
I'm thinking about if my partner were to do it for me (but has already expressed that he wouldn't.. Hurrumph!) The thought of gripping his stockings or garter belt or something while having sex is giving me some rather deep shudders of want now!
;-)