The stigma probably exists for the same reason conservatives hate gays more than lesbians. Anyway, if you don't want your child to have a stigma, there are any number of other things kids get stigmatized for and they're impossible to avoid since in many cases both choices result in stigma from somewhere, so better just to teach your son to let it roll off his back and be who he is. There's no way to protect your child from taunty little monsters, and to be honest you can take attempts to do that to an unhealthy extreme, but there are ways to help your child have mental and emotional strength as strong as the physical strength of Olympic weightlifters. If everybody cared what everybody else thought about them, we'd all be emotional cripples, because everybody is hated, disliked, or otherwise not 'gotten' by somebody else. That or society sees boys playing with dolls as worse than girls playing with action figures and I don't want my child to have a stigma.