Izzy hadn't asked him if he knew how to do foreplay, he'd asked if Lucius knew how to fuck. While Lucius would be game for riding Izzy into the ground, that's rather more 'getting fucked'. (A suggestion that Izzy has made to him many times in the past, but not tonight.)

"Oh please," Lucius scoffs and Izzy relaxes, shifting in invitation and making more space for his hand. He rewards the effort by working a finger into the man beneath him. The second follows shortly after and with no catch at all. The lube of the future is dead useful, isn't it?

"If there's one thing I know I'm good at it's this," Lucius tells him and leans in, his free hand moving to the outside of Izzy's thigh, holding it on his shoulder and forcing him to tilt his hips to accommodate. He's so close that, as his hand works in Izzy, the length of his cock ends up bobbing against the cleft of Izzy's ass.

"But, by all means, if it's bad I won't even argue."