Teacher: The average male thinks about sex once every 17 seconds.
Student 1: I don’t believe that!
Student 2: Me neither. What Else is there to think about?
That's probably the average frequency of such thoughts. The average duration of the thought is probably 16.9 seconds, leaving about one-half of one percent of thinking time for such things as eating and personal hygiene. Fortunately, many males are able to multi-task.