All About Monkeyysss?

well i wanna monkey for my brithday. and a pair of converses. and thats it. i need some information on monkeys and if they **** and pee all over the place or how to tak ecasre of thema nd everything. my mom doesnt mind it but my dad thinks that its a bad idea nad that thy are gross pets. how can i convince them and are htey gross?? cause if they are i dont want one. ha