Playing on Facebook. You can request lives at any time, even if your lives are full. Just press the heart on the upper left that has your amount of lives. Then go to the next screen which says ask Friends. If you want to give lives to your friends but you are on a higher level, you need to go down to a level that they have…
It's frustrating. When I try to get it I lose it and it messes up my game. Whenever I do get it it's usually by mistake but it does help at that time. It's somewhat useless