Why is "abortion on demand" such a terrible idea? If there's any time a person should have something they've a right to, it's when they're demanding it. The way this phrase works, the implication is that a woman should only have an abortion when other people tell her she can. In other words, they're open to the idea of abortion being a valid choice, but the choice has to be made by someone other than the actual pregnant person. How does that make sense?