I can't understand that fetish, and I certainly don't think it is right, but at the same time I am not sure it could be considered cruelty to animals either. So basically, I AM for outlawing for reasons of decency, safety, or morality, but not on the basis of animal cruelty.
Don't the animal handlers regularly take matters into their own hands to get the "seed" from the prize stud animals? That seems just as bad to me.