How long do you have to smile for them to smile back?

Answer:
If you smile with your eyes, by thinking in your head something happy, and smile outside with a small grin, it should take almost no time! Good luck!
First answer by Broadwaywouldluvme. Last edit by Broadwaywouldluvme. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].