I think it's because of all the time I've spent on imgflip,
a) partly because imgflip does have an intrinsically corrupting aspect; and
b) since I've used up a lot of ideas, it means I'm willing to "cast the net wider" in my search for new ideas, and post things I probably wouldn't have posted before.
That's kind of a shame though. That's not the right direction to go in, overall.