We can blame microplastics and BPA, sure. And while I would agree they certainly have an effect, the FAR greater destruction to male's testosterone/sexual appetite can be blamed on the advent of the internet and then eventual access to virtually limitless pornography at the touch of a button. Then there are also video games, which keep men "distracted" and docile. Which also helps curb test, especially since it usually results in a sedentary lifestyle filled with poor food choices(which...lowers test), lowers muscle mass(lowers test), poor sleeping habits(how many stayed up doing a Fear corpse run until 3am? Guess what.. poor sleep lowers test), etc.
But sure. It's all the plastic in the water. Or all those fucking WHORES, amirite?! Much easier to just blame that instead of looking inwardly at PERSONAL, poor lifestyle choices.