Can abstinence increase testosterone levels?
No it does not. Your body has a system that regulates your hormone levels. If your testosterone levels (or any hormone) are low, your body will tell your glands to produce more. If you have too much testosterone, like those steroid abusers who inject themselves with artificial hormone, your body will stop producing that hormone (thats why their nuts shrivel up). Sperm needs testosterone to mature but sex has no effect on testosterone levels.