There sure are easier places to penetrate. Luke's turning red just thinking about it. He wonders if this conversation is less suggestive from Aramis' perspective, but then he remembers what 'stabbing' is French slang for and decides no. It's probably not.

"Not sure if I should be learning to penetrate anything like that."

He thrusts the blade forward, this time focused on copying the flow of Aramis' hands. Better than last time, he thinks, but it annoys him how imperfect the gesture is in comparison.