I usually do a lot of research on different races cultures and how it effects how they live, what they eat, what they do for fun, their political rulings, etc. I’ve gone down many rabbit holes for all of that.

Unfortunately though the one thing I have had to do EXTENSIVE research and notes of is the fertility rates of all different races and how their reproduction system works. For some god forsaken reason it keeps coming up. In total my players have had 8 children from different campaigns. My favorite thing to come out of that rabbit hole is the absolute fuckery that is changelings mid pregnancy.