How do you convince my parents to get you another hermit crab?

i just convinced my parents to get me another hermit crab and this is what i told them i told them that hermit crabs can get depressed if they don't have another friend to talk to if your parents want to see where you learned this tell them you saw it on a website that's what i did but i cant remember what website it is now im going tO get another crab tomorrow!