Anti-caffeine bloggers are so annoying. There is nothing wrong with caffeine, it pretty much drives the modern world. Caffeine is a highly successful and safe nootropic and I'm convinced that people who tell you to stop it are the same people who would tell you to stop masturbating, or to take cold showers, or to sleep without a mattress. There is no good reason to stop caffeine. If you want an extra boost, just drin…
Masturbation changes your testostron levels, so I some cases that might be beneficial. Cold showers influence your metabolic rate, so they can help with weightloss. Sleeping on the floor may be better for your back, but honestly I don't know.
Cold showers may influence metabolic rate but their most pronounced effect is that they make you want to avoid taking a shower, resulting in stinky, anxious, unhappy people.
Masturbating is so much fun than any health benefits or detriments are irrelevant. It increases quality of life.