Riposte, with low pocket pairs, you are playing to hit a set. To make cold calling a raise preflop profitable, both you and the raiser must have somewhere around at least 10x the amount of the raise to give you proper implied odds. So for example, if you are in late position with pocket sixes and UTG raised $5, it is correct to call if both you and the raiser have at least $50 left in your stack. If you hit your six on the flop, theres a pretty good chance you can stack the raiser, if you dont hit your set you are done with the hand. Get it?