How do aliens reproduce?
Odd, I know, but my cousin and I were having this discussion over the weekend. How exactly would you imagine that aliens (the kind from outspace, not the kind with the green card) reproduce? Usually they are describe as beings with big heads, but no distinct male/female parts. I put out the thought that perhaps they reproduced by budding. Maybe the buds then fall off the alien's head and then you have a little alien. There was also the suggestion that perhaps they stuck a finger in another alien's ear hole in order to achieve satisfaction, but then that still leaves open how the little alien comes about. Maybe it's all just cloning and thus over many millenia of cloning, their reproductive organs disappeared.
I look forward to reading any other ideas put out here.