Watching someone else pee is inconsiderate.
Watching other people copulate is considered immoral and watching motorsport is evidence of cerebral insufficiency.
Watching cycling is, however, quite refined, like eating a gel made by dissolving a pearl in the blood of Johnny Hoogerland. Talk about it and people will nod knowingly.
BONUS TIP: Staying up late and snuggling into the couch will yield few improvements to your pedalling technique, but that chocolate spread is gonna get finished, no matter what you tell yourself.