I was really surprised to learn that Tails is male a few years ago. Looking at him now, I think it's probably I never detected even the slightest hint of testosterone in him. Well, he is supposed to be 8 years old- at least that's what the Sonic Wiki says. Thing is, the guys at my elementary school sure seemed to know about sex when I was only nine (i.e. they had testosterone). I didn't get what they were talking about until I was 10.
God, those kids were disgusting.