My cats do some strange things as well I've never tried to teach my cats any tricks, so I was very surprised when my older cat started playing fetch with me. Her favorite toy is my rubber hair bands, and usually when she gets hold of one she gets a bit aggressive about it. So, I was shocked one day when she dropped her hair band next to me and started meowing and rubbing against me. I guess it was more fun then playing on her own.
My younger cat has developed a strange habit as well. We just recently started sleeping in the same room, and we're slowly adjusting. I lay in my bed and make myself comfortable, and he'll come to lay next to me, leaning against me, which is very adorable and all. But if I move in a way that moves him too, he gets up with a very strict look on his face, starts meowing and bites me gently. I barely slept the first night because he kept disciplining me. XD