Hmmm, I've never really heard that before. I still think you'd be better off with at least a text link somewhere on each gallery page... "see more hot guys from xyz.com). It's not the habit of most surfers to click a big picture after they've already clicked a tumbnail.
I do appreciate 'soft sell' tactics. But I think you would see an increase in sales if you pushed the surfer just a little harder. ;)