I had to sit back and think for a moment, and I came up with about 10-13 for a rough estimate on max age. I say rough because although I say that now, if I would meet someone older then that but completely worth every bit of age difference it really wouldn't matter. This is also why when I hear news stories about people married with huge age difference I just roll my eyes. They obviously got together for in their mind is a good reason, who I am to judge that.