If you want to set her heart on fire then you need to learn this non-verbal cue. Let me teach you how to do a pec bounce. Step number one, press your hands together in front of your body to flex your pecs. This will help to develop that mind-muscle connection and teach you how to contract your chest. Then we gonna do one side at the time, squeeze your armpit and push your shoulder forward to fully contract your pec. Slowly minimize the shoulder movement while making contractions shorter and shorter until you master the skill.