I am 29.
Hello! I am 29 and have been practicing prone masturbation since i was 12. I use to masturbate about 3 to 4 times a week and never felt any problem masturbating in a conventional way untill last couple of weeks. I realised that i can not get erection thinking porn and that i get erection only after physical stimulation to penis or in a prone position. Is that normal? please advice.