A discrete way of implying sex, used to avoid potentially awkward situations involving parents or people you dont know. Also useful for texting for people who have troubles with getting their texts to the right person.
I think we should play some board games
(talking to your friend in a room with other sensitive people in it)
Friend - What did you do last night?
Yourself - Oh just played some board games
with the girl friend, her parents were outta town.
I don't remember the last time i played board games
, its been so long. (someone who doesn't get much action)