I Hope This Gives You a Good Hearty Laugh

I thought it was kind of romantic I wasn't being a fanatic I pulled it out in the cold You thought that was a bit bold I wrote it in the snow about you and me How much I love you I wrote it with my pee I almost froze it off - it and my left ball Then you hurt me when you said it was too small It's like out of the pool It follows the same rule Not that I expected you to drool But you didn't need to be cruel Now I pull it out again and what I write Your not going to like - it might cause a fight Not just what it says about you that is quite biting But the fact it was your sister who did the writing