Justin didn't resist in the slightest. During the virus he knew what he was doing, more or less, but without it guiding his actions, he was the slightest bit lost, so he thought nothing of it when his back hit the mattress.

He was too focused on the sensations to really care about too much else, anyway. Other than staying as calm as possible. He still didn't want to give Giriko the satisfaction of him starting to react, though Justin's body had a much different idea and arched up against Giriko's tongue.