Most of them do not like it ,some tolerate it.The body language will tell you right off the bat...babies generally scramble as quickly as possible to get away and even plop to the ground...larger ones open mouth,hiss and try to get away.You don't want to know how hard an adult angry cham.can bite.Then there are those few who will eventually slowly climb on to your finger,up your arm,etc.Not many in any group,and even some of those are fearful.So it's not completely unrealistic to have a "tame"one but they are not the norm.