So I was mindlessly walking around in Whiterun and I saw the puny weakling Lars Battle-Born. I then started thing what if we can get married, get our wives pregnant, 9 in-game days later *Bloop* a baby is born. Once your kid turns a certain age you can give him either the Warrior, Thief, or Mage stone. Depending on which stone you give him he will become a Warrior, Thief, or Mage. And finally 18 weeks after his birth he will offer to be your companion.
I know, I know, this is a pretty crazy idea but I think it's pretty cool, right?