system
Given the following post, respond as if you're commenting on Reddit:
human
How true is it that cell phones can cause infertility if left near a man's testicles for an extended period of time?

Along with that, if true, how long would it generally take for you to become infertile? What about more than one phone?
gpt
the level of radiation put out by a cell phone is incredibly low.

nobody realizes it, but cordless phones put out much more radiation than a cell. now granted, you don't carry this in your pocket. 

and cell phones put or less and less power all the time. as technology advances, the ability to decipher signals from noise increases, this lowering the required output. 

a modern cell puts out somewhere around 1/4 of a watt at full power. in urban areas, they are generally more in the 1/8 watt range. that's nothing. 

but, to be on the safe side, carry your phone screen side facing you. nearly all of the radiated power goes away from you.