Is creatine bad for you? and can masturbating give you an std in any scenario? 17 year old trying to boost testosterone naturally with supplements

Several issues: Creatine is a transient performance booster that will not have any long term benefit, other than draining your wallet. Masturbation with any contaminated toy might pass some of the STD germs, but not most,otherwise no. Testosterone boosters are hype, they are unregulated, do increase some factors that increase acne and shrink you nads, but will not cause testosterone to go up.

Yes/no/bad: Extra creatinine is bad for you. You are killing your kidneys for no significant benefit. It is unnecessary, dangerous, and costly. Masturbation can never ever give an STD. Even with a sex toy, it is almost impossible. If someone tells you masturbation itself can give you an STD, tell them to go away and never listen to them again. There is no safe way to boost testosterone.