I could potentially believe it.
I've been referred to as "pretty" or even "beautiful" many times.... and I'm a guy. On occaision I'll be mistaken for a girl. I also seem to attract alot of..... er..... "attention".... from males in general, to the point where it starts to get a little strange.
Does this have anything to do with my autism? I'm no doctor or scientist or whatever, so I couldnt say for sure, but I do think it is a possibility. So many other things sure seem to be related to it.