Lee is having a drink in the pub when he spots Adele. He has a chat about old times in BB, and how they fancied each other at one point, and it ends up with them going back to hers and having wild passionate sex.
At which point Lee realises what he's done. "What am I going to tell Sophie?" he asks. Then he has an idea. "Adele, do you have a stick of chalk?" Adele replies: "Yes, but why?". Lee said "I need it. See you!".
As he leaves her flat, he rubs chalk dust behind his left ear then sticks the chalk on his right ear. When he gets home, Sohpie is waiting up.
"Where do you think you've been, mate?" (OK there was no need for the "mate") she demanded.
Lee replied: "Well I was round the pub, and... well do you remember Adele from Big Brother? She was there, we got talking and went back to hers and ended up having wild passionate sex".
Sophie burst out laughing. "Don't give me that! I can see the chalk behind your ears. You've been playing darts again, haven't you?"