Look into taking maca supplements. This powder is known for being an aphrodisiac. It contains the photochemicals macamides and macaenes, which are said to boost energy and help men maintain erections. Because no conclusive scientific studies have been conducted on this substance, it's best to proceed with caution. Be sure to discuss it with your doctor before you start adding this supplement to your daily routine.
The only effects of masturbating too much are potential irritation/chafing from handling yourself too roughly, and potential difficulty maintaining relationships and/or attending to responsibilities if masturbation becomes an addiction. Anything you've heard about masturbation stunting your growth, causing blindness, hair loss, hair growth, etc. is a myth.