Hi i am getting white stuff on my penis since a long time nowadays it has increased alot and smells also. I smoke 20 cigarettes a day. I am just 23 and recently i was with my gf and i didnt got erection i do get erection at night sometimes and while masturbation but it doesnt last long and dont get hard erection like before. I am really worried whats going on. And i am afraid to go to dr in person. And ya i do have b12 deficiency i havent took any medicine or injection since a long time i used to get injection every month before 1 year