Susanne Gayne

My nearly 5 month old male wire fox terrier nips at my hands or arms sometimes quite hard when on the couch. I want to be able to have him on the couch so I don't want to train him not to come up. But it's wound up that I get up and he stays on the couch. He's been doing this for quite dome time. What's the best thing to do in this situation? I do have toys on the couch to distract him with - it just always seems to get to where I can't tolerate it further. Thank you.