What are some of the signs that a guy is lusting after you?

If you are a reasonably attractive female, give evidence that you're available and he's a normal, heterosexual male... he's lusting after you. Even if you don't meet all of the above requirements, he may STILL be lusting after you. Men are very visual and most just exercise restraint when situations like that are encountered. But normal guys certainly like to look at normal girls, and not to figure out if your shoes will fit them.