- Grade 1 (Severe ED): Penis is large but not hard.
- Grade 2 (Moderate ED): Penis is hard but not hard enough for penetration.
- Grade 3 (Suboptimal Erection): Penis is hard enough for penetration but not completely hard.
- Grade 4 (Optimal Erection): Penis is completely hard and fully rigid.
- Both stress and anxiety are reduced, which have a positive effect on a man’s sexual desire,
thereby, promoting optimal sexual well-being.