Technically, just two, but it is really hard to get them to breed in captivity.
Two. One to hold the ladder and one to screw your mother - I mean light bulb!
Amen.
Because they pack light.
Two, but don't ask me how they got in there.
Willing suspension of disbelief
A melancholy.
Pan, duh!
Bread in captivity.
They're ape purists