if we talk about "biotruths" humans were built to procreate. Procreating != "being attracted to sexual act". It's being attracted to a particular person with whom you want to start procreating/a sexual act. Porn is the opposite of procreation, if we follow the logic of "biotruths", so humans weren't built for that.
Human sexuality isn't that simple. There are so many variables that go into sexual stimulation, limiting it to just "humans want to procreate" is ignorant.
If humans wanted to only procreate we wouldn't have invented the condom