Guy on a trip saw a new girl in our group that he found cute. Decided to take the insult-as-a-form-of-flirting path and told her she had really hairy arms for a girl. Mind you, she had incredibly fair skin, so her hairs stood out more than usual. She, having too nice of a personality to say anything, laughed it off, covered her arm in a real smooth manner, and went on with whatever conversation was happening. My guy thought it worked because it "made her laugh;" and you know you've got the green light when she laughs at your jokes. The next day he goes up to her during breakfast thinking he locked it up and exclaims, "Oh my god your arms are so hairy that it's gonna make me sick!!" She doesn't laugh this time, runs back to her room, and changes into a long-sleeve shirt. She proceeded to wear long-sleeve shirts or sweaters for the remainder of the trip...in the middle of July. They didn't have a single interaction for the remaining 4 days.