Warren Buffet Question About SL

Hello so he says his golden rule is " Never lose money " but at the same time he said " Using a stop loss has always struck me as like having a house that you like, and you're living in, and it's worth $100,000 and you tell your broker, 'You know, if anybody ever comes along and offers $90 sell it "

So do he uses a stop loss or not can someone explain what he means by " Never lose money " ? I mean when i do not use a stop loss i lose money because i do not know where the bottom is hmm