LeAnn Rimes ' orgasmic reaction to having her jaw released is totally normal ... so says the dude whose fingers were deep in her mouth. Garry Lineham -- the internet personality and founder of Human Garage -- talked to us about the treatment Rimes shared to social media Monday ... which left her sobbing after Lineham knocked out the tension in her jaw. Lineham tells us Rimes' reaction -- while the subject of more than a few wisecracks online -- is super normal ... the release of trauma