Question about taming rats and potty issues!?

well wen getting them to want to be held its hard and mostly depend on the rat itself like mine i had two rats that loved me but never liked to come out when i picked them up it was a struggle to get them out but when they were on me they loved it they'd climb every were so what i did to get them to want to climb on me is i put a treat just out of there reach and over my arm or leg something like that (it has to be a person that they can climb onto) so this way they had to climb onto me to get a treat that teaches them its ok to come out with you like directly from cage to person this should be practiced regularly don't give them the treat until some part of them is touching you then eventually they should get that coming onto you is good so they will get a treat for it since they are very train able and very smart it shouldn't take long for them to want to come onto you as for pooping they don't care were they poop and its also very hard to control since they poop ALOT so it is normal and they don't care were they poop i don't think theres a way you can stop this but it they pee in the little box that's really good hope that helped if you have any more questions contact me at jeang45@yahoo.com