Why do poker players limp? If you have something good, raise. If not, stay out. Simple right?
Above (click to enlarge), I was in the big blind with ♠8 ♥3, not a hand I'd expect to win a big pot with. Because the villain limped, I got a free look. I flopped trips, and an 8 on the river gave me the boat. The villain paid me off -- amazing, actually.