A friend of mine has a son (24) and two teenage daughters.
The son is (in my opinion) gay, but we don't talk about that, I'm not sure he's certain himself, he's sort of asexual in look and mannerism, though there is a hint of limp.
Anyway, to get to the point: He has a very high voice, he sounds exactly like his sisters and mother. It gets embarrassing when I call, as I have to pussyfoot around the introduction issues:
"Hello, Jamieson residence..."
"Oh, hello there, er....young, er...is your dad in?