Dreams.

I won't describe the entire dream. There were some interesting and amusing moments (a slight sexual undertone, not directed at a specific person from my life, but at an abstract personality), but not enough to warrant a detailed description. The ending of the dream is what matters. It was another lucid dream. A former classmate called me and suggested we play football. I told him that it wasn't that cold yet and we could, but on the weekend (the only days when we could get everyone together), it would already be too cold and we wouldn't be able to. Then I told him that we wouldn't even be able to agree on a time now because it was a dream, and I was currently sleeping, not talking to him on the phone. (Also, I guessed that I was lying on my left side. I was wrong; I was lying on my right side). He agreed with me, and I allowed for the possibility that he was also asleep and having the exact same dream. We seemed to have some kind of telepathic connection, which amused us.