I’m 22 and everytime I have sex my penis can’t stay hard. I’m not sure if it’s becuase I have scolioses or because I masturbate too often. On top of all of this my sensation in my penis while having sex doesnt even exist which leads to me not even reaching an orgasm . But when I masturbate I have the sensation with no problem and I could orgasm with ease. If someone could explain how to fix this issue i’m having that would be great. Thank you