No time
A man walks into the dentist office and lies in the chair... The dentist comes in and proceeds to do an examination. In the middle of the exam, the man tells the dentist and apologizes that he has just had lunch and did not have time to brush his teeth before the appointment as he was running a bit late.
The dentist tells him : "That's ok. I understand. I just had to use the bathroom and didnt have time to wash my hands."