Now is the perfect time while your neice is still learning that this is not the way things are done, and that girls cannot marry girls, and boys cannot marry boys, it is not normal. Just as we are told the same thing when little girls want to marry their daddy's, we were told that that is not normal, and we cannot marry our daddy's, or family members. It is best to nip these kind of notions in the bud while we can, and instill normalcy in our children, and that SS lifestyles are not normal, they are kinky. Sorry it may be funny, but I don't think it would be anything healthy to encourage.
The child in question above is 3 years old. Is this an appropriate age to be discussing human sexuality? At what age should this be discussed? Should we, as parents, be passing our own bigoted views onto our children? What could the long term effects be on these children and there ability to interact with the rest of society?