Dude, a steak knife can end a life in an instant. As for being taught that they can be attracted to anyone, my child can know that, but I'll be teaching that with a Christian background. If that child grows up and decides to be something other than straight, I will still love him.
The key here is parenting. You can teach your child what you want, and I would want my child to know how to protect himself and his household before I decide what he does with his attraction.