[ Alhaitham snatches the bottle of lubricant away as soon as she sees the opportunity to do so. It's slightly amusing that they truly need to be the opposites no matter the situation—that's the conclusion he reaches after hearing that Kaveh is feeling embarrassed, at least. ]

Watching you do it first sounds like a reasonable option. [ It falls in line with his whole observation logic, too. ] But I want to try doing it myself. That should give you an idea of how compatible we are.

[ Alhaitham wouldn't be himself if he didn't come up with a pausible reason why the second option might be even better, even if it isn't really necessary. ]