Tough one... beds and couches seem to attract bunnies like honey for bees.. LOL I didn't know other bunnies like to chew hair!! haha
I loved to make my brother sleep and let my bunny go chew his hair hahaha
I think if you get a pen, it might hurt your bunny, he will still try to get to your bed. I added a higher mattress to my bed and my bunny stopped jumping there for some time, but then he learned how to jump higher. He failed and fell some times too - crazy bunny!!! So it's better not to get anything that could hurt.
The only effective way to keep a bunny away from a bed seems to be closing the door- with the bunny out. But if your bunny is used to stay in the room,I don't doubt he'll knock his head on the door, trying to break it to come in.. my bunny was used to staying out at night, but he didn't like it. He scratched the door and it was very sad. I always had to fool him before going to my room (so I wouldn't close the door at his face). I placed some treats close to his home and ran to my room. Bad thing is that bunnies are smart, soon he learned my method.. and whenever I placed the treats, he'd run to my room... My bunny outsmarted me many times... so yeah, i might agree with the previous comment saying "keep your head under the covers" LOL
:surrender:bed::rabbithop