I don't care et al.
The bride and all her guests, apparently.
Tooth (truth) or Consequences.
Seven - one to actually change the bulb and six to complain that they liked the old one better.
Three. One to post it, the second to post a better punchline in the comments, and the third to complain that it's a repost.
Because his colleagues would call him the Quantum Mechanic.
Underlay! Underlay!
May the force be with you
Whirled Peas