Avoid doing this. Those feelings should remain with the adults. I think your father is GAY because he has a lot of male friends. Unfortunately, it is not uncommon. Adults can handle situations better than children, that is why we ARE adults.
Children have limits.
Children learn what we as parents teach them. If you lie to your child about the other parent, it will come back to haunt you. They will be able to figure it out on their own, if they've been lied to. None of their business- Parents have their own responsibilities. Children are just that, children.