When Husbands Sing

Is mine the only husband that sings badly on purpose? Or at least I hope it is on purpose. I have to bite my lip to keep a straight face when we're riding in the car and he starts making up his own lyrics. And heaven forbid I actually pay enough attention to notice what the lyrics are. Let's just say they are usually PG-13. I can't believe some of the things he can come up with on a whim. Don't get me wrong, it's hillarious. But it's the kind of humor that makes you groan and roll your eyes at the same time. I'm really going to be in for it if we have boys. The last thing I need is someone for him to teach his humor to.