That’s not strange, it’s adorable!
He is playing and getting exercise, and wants you to both pay attention and participate. They like a good running course, and you are providing a fun and friendly way of being part of his play time. I definitely know bunnies who tell you – often with their mouths – how they want you to be in their game.
Baby bunnies haven’t learned to control their mouths yet, so can nip and hurt. Adult bunnies have learned to use their teeth like another hand, so they touch and pull with them but do not actually bite. It is rare that any bunny will bite and draw blood, and if it happens, it is almost always a very young bunny who hasn’t mastered control of their mouths to communicate yet. If you are ever bitten hard, it’s possible that your bunny is ill and should be checked out by a vet. A bunny who is sick or in pain may bite badly. But in this case, he is tapping you on the leg with his face to get you to do what he wants.
Bunnies can’t talk – but they communicate what they want very well, don’t you think? Enjoy him!