I was never very happy with the joke in this strip. I tried expanding it by adding a few extra frames for this 'Redux Edition' - basically it used to be the first 2 panels and the last one. I don't know if it helps much, but I felt that we needed to see Bish leave the pub and run back to his room in the Slumbug Hotel in a furtive, but purposeful way. I guess it does tell us something about Bish's character, in that if something's not listed as a sin in his big book of sins, then it's fine to go ahead and do it. Ultimately I guess this one's more about the plot than the joke.