I know liberals who really beliefve this stuff. They think conservatives and Catholics are "hung up on sex," "just want everyone to not have sex because they aren't getting any," and want to "punish" women who find contraceptives inconvenient and thus find themselves pregnant, and punish homosexuals by not finding a cure for AIDS.
However, according to their playbook, there indeed is a facet of human sexuality that is deemed unhealthy: any self-chosen suppression of a desire.
Why do liberals think the answer to poverty must be to birth control and abort the children? They say so there aren't so many mouths to feed, but don't most cultures need a lot of hands to grow the food so there is enough to eat? Isn't that the same zero sum thinking that rejects tax cutting to grow the economy?