"accidently" bit husband while having ?

My husband and I of 13 years have been getting in to it a bit. We have always been the type to bicker but this last 2 weeks have been overkill! One thing about us is that even in really big fights we still have . Well after an argument while I was performing an act on him ( I don't want to say in case of censorship) he said something rather rude; he said " this is the only time I can get your porky *** to shut up! " I guess I must've bit down because he screamed really loud and starts calling me names and then threw a magazine at me and left. He returned to the house the next day. This happened sunday and he still hasn't spoken to me. He has been silent and short! but he still will help me and since my car in the shop he drives me around. I honestly don't remember biting him on purpose and I have apologised and done things to try and get him to forgive me. I don't know what to do. I love him dearly, but sometimes he takes things to far! Any advice?