There's also Chemical Penis Enlargement where you use injectable vasodilators to maintain prolonged erections as described in the Penis Enlargement patent.
When you smoke tobacco your penis shrinks temporarily, as it is a vasoconstrictor. When you smoke weed, your penis supposedly gets bigger and harder, because it is a vasodilator.
When you smoke tobacco your penis shrinks temporarily, as it is a vasoconstrictor. When you smoke weed, your penis supposedly gets bigger and harder, because it is a vasodilator.