Let's talk about reproduction.
Male walking leaves (the phylliidae family) will clean out the female's vagina before copulation. They do this to remove any possible spermatozoa from previous mates.
Some male humans go down on female humans. Is it possible that humans developed this sexual strategy for the same reasons that walking leaves did?
Are male pussy eaters betas AND cûcks?
Male pussy eaters ARE betas and keks.
Seriously, it is fucking disgusting.
But no, this is not our strategy to clean out sperm from other males. We grow large penises, way bigger than the vagina´s length, to do exactly that, remove the sperm from other males.
No. Oral sex is a part of foreplay which leads to smoother intercourse and a higher chance of orgasm, the vaginal contractions and moisture of which removes already present sperm and briefly causes any sperm released afterwards more likely to make it to, and through, the cervix. This increasing the odds of pregnancy.
Ultimately, ignoring any deep hardwired bias towards a behavior that we're not fully aware of, modern and primitive humans likely just enjoy pleasuring each other. The behavior rises from another trait and just happens to be beneficial.
Fuck off popsci faggot.
Instead of making meme conclusions, read whatever literature there is on the subject and then ask about it and someone her might work in the field.
Fucking armchair evolutionary psychologists.
Oh, I forgot. A good deal of information is also conveyed via bodily fluids. It can be a way to sample someone's health and reproductive viability, similar to the way that people are often more attracted to people with immune systems that are more different than their own. Pheromones are only one way signals like these are exchanged.
The penis contains estrogen receptors. I'm not sure about the mouth or lips.
Going down on a female, and being repulsed by a smell, is a good behavior for males to have.
Not bothering to check a pussy before fucking it can lead to some consequences.
OP is not a faggot, just a moron whom I hope dies from AIDS complications.