I've been having difficulty acheiving full erections like I used to. Im 22 years old, I run every day, and take very good care of myself. Im getting what i would refer to as stifies, where im getting aroused but not fully. Last time I masturbated I was in a semi-erect state and was still capable of acheiving climax. has any one else ever had this issue? is there any thing I can do, not including pharmaceutical, to fix this problem?