Player: "I was raised by elves. Does that mean I can do elf-y things?" GM: "Errr, ummm...which ones. You trying to munchkinize this character?" *squints eyes* It's a common fantasy trope, so how to model it? Well, I got a idea... http://www.ravensnpennies.com/2015/02/gurps101-cultures-in-dungeon-fantasy.html#.VOPL4_nF_Cs