Games Taught Us?

well there was a contest by some publisher on twitter in India and the hashtag #GamesTaughtUs is trending at top for hours in the country (and in my city too)
I thought why not have it here, there were many hilarious tweets there, fellow members here might bring out cooler things to say :D

So what has #GamesTaughtUs?

also, I won :p
the prize awaits some merch don't know what hopefully something decent :D