Here's some wisdom I picked up while watching an infomercial for Tony Little's Gazelle Sprintmaster - always maintain good form. Sloppy form is how people get killed. Don't think the same is applicable to sucking dick? Neither did she.
This video really hits close to home. I too was once ridiculed for bustin my sloppy goo nuts prematurely. My ego was scarred and so was my penis (herpes). Watching this brings it all back.