Don't Forget About Your Hands. Just because you are using your mouth to give your man a bj, it doesn't mean that you should leave your hands idle and doing nothing.
Instead you should be using them to massage, rub, stimulate and caress around his member. So do pay some attention to his testicles. When you are grabbing and rubbing them, just make sure to be very careful though. Many who first hear about this blow job tip get a little excited and accidentally squeeze too hard and just end up hurting their man.
So remember to be soft and gentle!