I feel that when kids ask it, they're just curious but like the others said it doesn't matter anyways to them, they'll forget it in a couple minutes.. lol. There was this little girl I befriended while working, I think she was like three years old.. She told me she saw a boy wearing the shirt and watch that I was wearing and said they were boy clothes and my so why was I wearing them? ((I'm not out to anyone, pre-everything.)) I just told her that anyone can wear the shirt because it's a cool shirt (it had a spiderman logo on it.. one of my favorite shirts) and same went for my watch and she just shrugged and nodded in a some-what agreeing way and we just moved on from that quickly.
I don't mind when kids ask questions, but I absolutely despise the teenagers or older than that who snicker and whisper and point at me as soon as I walk into an area, acting as if I don't hear them. Oh the irony, considering I'm a young person myself..