I did it with my fingers like your trying to get them hard.. Not trying to be weird.. And then do each one like 10 15 min each and you'll start to feel contractions when you do they tell you to stop because they come strong and close and they do!

@maddieg4648, how can i do nipple stimulation? Its there any special way to do it ?

Nipple stimulation worked like a charm for me!!!

^^what @threekings101415

Sex, Walking. Squats