It's hard for Kris to not notice, in the beginning.

"So," he says. He hesitates. "It looks like we're going to have some sex." Adam's eyes pop open. "You - don't - have - to – " "Are you fucking kidding me?" Kris doesn't curse, not really, but for Christ's sake- "That better be some token objection. You had better not be serious."

Even other glittery aliens are attracted to Adam

Kris honestly thought it was a phone booth, okay. But a phone booth wouldn't easily fit three people in it, right? It also wouldn't be bigger on the inside. A phone booth couldn't travel in space and time. This is a story of Kris Allen meeting a mad man with a blue box, going back in time, and realizing that sometimes it just takes a long time to figure out that you have always been in love with somebody.

This is not your typical SGC mission. No, not even for SG-1.