Sounds normal to me. My BP, who I think is a girl, comes out when the sun goes down and is on the move all night roaming around her cage. If I take her out, she doesn't sit still either, until I put her back and then she calms down for a little while. I don't worry about it much anymore because it's so consistent. The only time she doesn't roam is when she is in shed, or right after eating. As long as his husbandry is right, I'd say he just likes to explore.