A doctor gets a visit from a patient who is not able to get an erection

A doctor gets a visit from a patient who is not able to get
an erection.

Doctor: Are you married?

Patient: No.

Doctor: Do you masturbate?

Patient: No.

Doctor: Do you visit prostitutes?

Patient: No.

Doctor: Do you have girlfriends?

Patient: No.

Doctor: To phir khada karke kya calender taangega?