Dude I'd say be very careful doing this. It sounds like you're just extremely horny and want to blast your dick into oblivion, which at your age is understandable. But, in reality you don't need to take that much. Just a little help, like Cialis or Viagra (at your age) will blow your mind and your dick.
Do what you like, but don't take an over-powerful cock cocktail that might be harmful to your favorite toy.