This is probably silly speculation, but I'm neither good at testicle models nor the more squishy sciences. So sperm virility is correlated with temperature. My

This is probably silly speculation, but I'm neither good at testicle models nor the more squishy sciences. So sperm virility is correlated with temperature. My phone gets very warm if I leave an app running. I keep my phone close to my testicles. The wikipedia page on "Semen quality" is now in my browser history. I mean it's spurious, but I wouldn't be surprised if a running cellphone heats up the inside of your pants just enough for you to take a minor hit to semen quality. There's also a blood vessel that leads to the testicles that sits fairly close to where my phone sometimes goes. My browser history now contains anatomical diagrams of scrota. This could interfere with the thermoregulation of the testicle. That or the tails act as tiny antenna. I'm sure glad that I'm nowhere near the field of Biology, and I'm sure Biology is glad too.