I kept expecting to see Tory's spine go all red.
Which makes me wonder. Why couldn't they come up with a cylon detector that looks for little red dots on a person spine?
One, Tory was on her back, maybe Gaius wouldn't be able to see it? Two, Gaius doesn't know about the glowing back anyway (and neither does Helo, for that matter). Makes one wonder if they don't have sex in any position to where they'd see their backs.