Alright when start giving my man a blowjob after 2 mins my mouth start to tighten up and start to hurt. I have stopped and stroked it, then tryig licking and playing with his balls. But It always tighten up and I cant go any longer. Is this something I can do besides chewing gum lol. Is there something wrong with my muscles in my jaw? Is their a better positon to do this.