Understanding しょう in いいことしょう


How is しょう being used in this expression? Is he saying "Let's have a good
time" or something more nuanced? Context is that it's a creepy dude saying it
to a girl as she approaches.




Practically it is a way to say _let's go to bed together_. Literally it means
_let's do a good thing_ and the good thing is a euphemism for sexual act (
_good_ being interpreted as pleasure).

