How do you know when a man is aroused around you?

A lot of things can turn guys on, and you dont need to be alone to do them. From tim-to-time give them a flirty closed-mouth smile, maybe a devious kind of smile. If you are sitting next to him, bushe your foot or leg up against his. whisper something sexy in his ear or lean on him, boys love cleavage. wear low-cut shirts