I like the taste of soap

"Jingle Bells, Jingle Hells"
This is what Cooper keeps singing.  He really is starting to like rhyming.   I quickly tried to shut down that rhyme but it seems like he doesn't understand why.  I am thankful that he doesn't get that "hell" is a bad word to say, but I told him to stop saying it or I was going to wash his mouth out with soap.  His reply, I like the taste of soap.