Abortion

[A-Man]

This not just implies, but it explicitly states that if you are financially (or otherwise) incapable of raising a child you should not have sex.

I don't know where you're bringing this from. I'm guessing the rope and the well analogy was not very clear. I am merely suggesting resorting to safer forms/positions of it.

This is silly because the stress relief provided by sex would very likely benefit people in financially (or otherwise) tough situations.

Well then add that to the motivation you get from the thought of raising your child/scene of your child's first moments (which results' I believe should top that of the stress relief), and you're basically a jet.