What are LOVERS?? OMG!

OK he is usually great at using new words and phrases in context.....HOWEVER he said to me the other day ,"Spongebob & Mr Crabs are lovers.". Yes LOVERS!!! I replied, "they are not lovers Mr Crabs is Spongebob's boss". He says,"ok mom I understand". So then he said, "well what is a lover then??". OMG. So I tell him that mommy's and daddy's are lovers RIGHT!!!! That should do it. He tells meme (grandmother),"mom & dad are lovers". You should have seen the look on her face PRICELESS!! Now he will say to me, "I will be faithful to your love!!". He will ask me, "will be together for eternity??" what do you say to that, I answered of course we will!!!