My friend (30M), who is a straight male like me (26M), likes to joke around with me a lot, since we are close friends. However, he found out that my chin is ticklish, and kept chucking me under there as a joke, without actually asking for my consent. I don't necessarily mind it, but he would never, do this with a female friend, as it could be seen as creepy/potential harassment. Is it a double standard that I was tickled without consent, but that he would never tickle a female without consent?