Think about the proximity between the anus and vagina and their relative arrangement on a cow.

There are some unisexual salamanders that can be triploid or even pentaploid, and it doesn't really affect their fertility because they are all female and reproduce by mating with males of closely-related species.

It might not even be that it worked better, but just that it worked well enough in context of how well-adapted the species was at the time overall.

That shouldn't be true unless there's something being evaporated from the surface, in which case flowing air might speed evaporative cooling. By itself, there's no way for warm air to cool an object to below its own temperature.