How many Narcissistic P.D. does to take to change a lightbulb?
Just one. To hold the lightbulb but he has to wait for the whole world to
revolve around him.

How many Borderline P.D. does to take to change a lightbulb?
Just one. To threaten suicide if you don't change it for him/her.

How many Obsessive-Compulsive P.D. does to take to change a lightbulb?
Just one. But he has to check it 100 times, one for each watt.

How many Passive Aggressive P.D. does to take to change a lightbulb?
Oops.I can't believe I broke the last one. I guess you'll have to sit in
the dark.

How many Dependent P.D. does to take to change a lightbulb?
None, he's still clinging to the old lightbulb.

How many Histrionic P.D. does to take to change a lightbulb?
"You want me to change the lightbulb? I could burn my hand! I could be
electrocuted! I could fall off the ladder and be paralyzed for life! You
don't love me anymore!"