Yeah, the sun is brighter because it is getting ready for the big eclipse event. As far as the sperm count goes, uh, I have no plans to get samples from the billions of men around the world.
I've no idea whether the sun is hotter... I think that certainly there are places where they have hotter weather and more of it.. but not the UK, we keep getting rain..so I can't say.
Sperm counts are considered to be down in many countries.. I don't believe it's necessarily connected with the sun... more likely stress, more unhealthy lifestyles and obesity and pollution.
It's always been bright and unbearably hot in Florida, maybe that's why people here are bonkers. Not sure about the sperm count thing, people still keep popping out babies left and right.