Because in their philosophy sex serves a purpose (procreation and the deepening of the marital union).
Anything that doesn’t support those two aims (contraception, abortion, gay marriage, pornography etc.) is therefore immoral but there’s nothing wrong with sex in its ‘proper’ context.
Their philosophy is extremely inconsistent. In reality it's emotionally driven. Not sure what specific emotions cause one to think sex is wrong except for reproduction, but a lot of the people who push this sort of thing turn out to be closeted gay homophobes.
I’m not supporting it, but how is it inconsistent?
I can speak more to the Catholic view than the evangelical, but if you accept the initial premise that there is a creator God then the rest follows fairly naturally (you can look the ‘the theology of the body’ if you want to read more)
I didn’t say God only wants people to have sex for reproduction. There are two purposes in this philosophy: reproduction, and the deepening of marital unity
It's a redpill/misogynist/incel/Tate-style talking point, they have this meme that women just file rape charges against everyone they ever regret having sex with.
