Anons, I think this refers to a joke I told on the board a long time ago, it goes like this:
Three men went camping on night and in the morning one man said, I had a dreamt of a young lady having a relationship with me in the missionary position all night long. The next man said, funny, I had a dream all night long of a women giving me oral pleasure all night long. The man in the middle said, funny, I had a dream of cross country skiing all night long. Kek.