Im currently 18 years old and i've been masterbating since i was 16 years old ,ive had a girl friend but we never got to anything like sex. The longest ive not masterbated would be a month tops when i had my exams half a year ago. I did it twice or once a day before. Now im in med school and on my way to be a doctor and stuff. But now ive started to masterbate around 6 times a day at different times of the day. Especially when im in bed to sleep i watch porn and masterbate successively for atleast 5 times varingly. I feel really sinful each time but end up doing it again just a few minutes later. I just did it 5 times in a row now and wanted help. Is this healthy? Normal? Wrong? What should i do?