Ianto tenses for a moment as John's arm goes around his shoulder, before he relaxes against the other man's side. He can feel his heart racing a mile a minute, but this is... Good. This is a good sign. John's fingers in his hair. He resists the urge to shiver at the touch, a little over-stimulated by it through his nerves, but certainly not enough to want to pull away.

"That must be it," Ianto replies, aiming at his best light tone. "And you haven't referenced sex with alternative alien lifeforms even once." Yet.