Men pretty much like all women. They may have a favourite type, but that can change and it's not like they wouldn't look, or flirt, with a woman of a different shape. He can like your petite shape, and their curvy busts and butts. It is said though that if a man cheats, it is usually with someone unlike his partner. Don't worry so much what "type" of woman he is flirting with, worry that he is flirting at all, and look to home to fix it, don't blame this on outside factors.