A man goes to a psychiatrist, and tells him, "Doc, I think I have an
obsession with sex."
The doctor agrees to examine him and begins by showing him various drawings.
First the doctor draws a square and asks the man to identify it.
The man immediately says, "OMIGOSH!! Four people having sex!!!!".
Next the doctor draws a circle, at which the man gasps, and says, "One man
having sex."
Thirdly, the doctor draws a triangle, which, of course, the patient
identifies as, "two woman and one man having sex".
The doctor puts the drawings away and says to the patient, "Yes, I do believe
that you have an obsession with sex."
To which the man replies, "ME????? YOU'RE the one drawing all the dirty
pictures!"