Martial arts are a serious business, but sometimes a good laugh can be just what you need to lighten the mood. Here are three jokes that will have martial artists rolling on the mat:

1. Why did the martial artist cross the road?
   To get to the dojo on the other side!
   
   

2. Why did the martial artist carry his black belt around with him everywhere he went?
   So he could tie his pants up!
   
   

3. What do you call a martial artist who has a black belt in karate and a PhD in physics?
   A Karate-Doctor!

These jokes may be simple, but they're sure to bring a smile to any martial artist's face. So the next time you're at the dojo, don't be afraid to crack a joke and enjoy a good laugh with your training partners.

Remember, martial arts is not just about physical skills, it's also about having fun and enjoying the journey. So don't take yourself too seriously, and always keep a sense of humor!