I never have. A few years ago I had a talk with my doctor and he explained the low level of risk for STDs through oral sex. Since I had (somehow) managed to acquire the Herpes virus (oral) back at the tender age of 12, I knew one risk already existed for the blowee, especially if I was in the midst of an outbreak-during those times I curb my appetite and do without, over the years I have developed a sense of when an outbreak is impending (usually within the next 3 or 4 days). Having sucked and savored hundreds (if not thousands) of cocks over the past 30+ years, I can safely say I have never acquired anything beyond that initial Herpes catch; which, was probably courtesy of some relative who was into the annoying wet kisses (hated those as a child) since I was not yet sexually active then.

Although the initial thought of a latex condom in the mouth is unappealing, I am aware that there are flavored condoms these days which might make it more palatable. I have had a handful of persons (male and female) insist that I put on a condom prior to getting a blowjob-one man insisted on it as it was a way of proving he wasn't cheating on his wife or gay.