[cypher]

He is an adorable little ham

Some hams just don't like being touched or stroked much so it may just be the way he is but you could try a few things to get him more comfortable with it, if you put some treats on your palm & just make a ring with your thumb & finger for him to pass through to get it he will most likely to be happy to do that & will get used to your fingers brushing him as he goes through, you can also just make a tunnel with your hands, cup one hand over the other & let him run through like that.
Do you sit in the bath with him during play time? I find Russians generally tend to enjoy just using you as a climbing frame if you do!