Strange is already leaning towards Lambert, getting ready for smooches when nope, okay, not going to happen. He takes a few steps back, trying to look as innocent and 'why surely I wasn't going to kiss you' as he can muster (it doesn't really work.)

"I thought you'd at least want out of that ridiculous outfit—which, by the way, has some concealing properties. Nobody's looking at you."

Having picked up a looney tunes reputation in Venice, Strange is entirely aware of that 'what the hell is this person doing' sort of look that the eccentrics, the madmen, and then men in sparkly booty shorts get on a regular basis. Nobody's given Lambert that look. Hell, nobody's even paid attention to Lambert to begin with.