People also underestimate the extent to which he lies to literally everybody literally all day – including to Carrie and about Carrie. 'Lies' isn't even a useful word with him – he lives inside a fog of invention and 'believes' whatever he has to in the moment. E.g He both knows he's lying about the parties AND thinks he did nothing wrong. This doesn't make 'sense' unless you've watched him carefully or similar sociopaths.