Since I first 'discovered' myself, I have been turned on by girls (and some guys) in sweatshirts and sweatpants-with nothing on underneath. I wear sweats whenever I can, and enjoy the feeling of the soft fleece against my skin. One of my favorite solo techniques is to take a soft worn sweatshirt, roll the sleeve up so it forms a tight opening, lay back and gently force the sleeve over my hard cock, then move it up and down (it is tight over my head and shaft) until I explode into the sleeve. Feels great and no mess...sometimes I will put a pile of sweatshirts next to me on the bed, close my eyes and rub my cock with them one at a time and try to guess from the texture and feel which one I have against me. This is also great fun with a partner.