Question: what does it mean when a guy grabs your crotch?
Answer: It's the same with affection – looking at your skin will make him want to touch it, so he subconsciously acts it out on himself." Even grabbing his crotch can be a good sign – if it's done subconsciously and not ostentatiously, it may be that he's already feeling sexy, making him more aware of what's between his legs.