20 years old. Been PMOing since 12 years old have pmoed lying down 90% of the time. I am able to get full erections lying down and sitting down without porn and to touch. However sitting down erections fade quicker when sitting. I get morning woods most days however is not always 100% Standing up I cannot get a strong erection whatsoever. Which is a common symptom found in pied. However it could also be due to many years of conditioning. I'm thinking this is more likely and thinking I should condition myself to masturbate standing up by standing up during sessions 2 times week if I chose this route. I have abstained from porn for over a month and MOed twice in that period. What are peoples opinions ?