Two. One to put it in and one to complain that he never screws anything anymore.
Just one to hold the bulb while the world revolves around them.
1.. 2.. 3.. BOOM
Dad says: "You are my son, I'm confident about that. Your friend over there, is also my son, THAT is confidential.
How will I ever find another performer of your caliber? (Source: a dad on thanksgiving)
None. Light bulbs don't change anything.
Just two. One to politely ask and the other to politely help.
Because they pack light.
None. It will happen itself.
People sometimes get upset if you shoot a duck. The duck is much less greasy. BUT MOST IMPORTANT Nobody ever complains about a duck's bill.
It sounds like you have a reptile dysfunction.