Once you’ve installed a few, there’s no going back. Eventually, you might end up with a setup like this, breaking the game’s lore and theme as badly as possible. Even Sven, one of the NPC followers, realises that something’s not right.
If you are bored with your current follower in Skyrim, you can always add the absolutely ridiculous Mr Unicorn The Cyborg Gentleman Fish. He is a fish with a top hat put onto mechanical legs.
I used to think the CBS Naval Intelligence procedural NCIS was a show aimed squarely at the extremely mature crowd, until a recent episode took an arrow in the knee.