Mating.

So. Your grandma sends you the most beautiful letter on how having high standards for your future mate makes it easier to know who is "the one" when he comes around. You think, "What the heck. I'll just raise 'em up then." You decide your future mate must be a musician. You decide your future mate must play in the band Reel Big Fish. Your future mate's dang hot. You definitely know when your future mate comes around.