Why is sex so bad to parents?

Not All Parents Think Sex Is Bad. But Those Who Do, Do Have Their Reasons. Such As Sexual Diseases, Pregnancy, And Just The Fact That Their Little Child (Even As An Adult, Parents See Their Offspring As Their Little Babies) They May Feel Your Growing Up To Fast. You Should Take Into Account Their Feelings In The Matter, But Sex Is Fine If You Don't Rub It In Their Faces (Not Literally)