Best I can tell National Masturbation Month was started by Good Vibrations back in 1995. According to the GV website:
Earlier that year, then-Surgeon General Dr. Joycelyn Elders was fired for saying that masturbation should be discussed as part of young peoples’ sex education. We were astounded. It was one of the most sensible things we’d ever heard a government official say — and it cost Elders her job! We started National Masturbation Month to raise awareness, and because we wanted to highlight the importance of masturbation for nearly everyone: it’s safe, it’s healthy, it’s free, it’s pleasurable and it helps people get to know their bodies and their sexual responses. Of all the kinds of sex people can have, masturbation is the most universal and important, yet few people talk about it freely — worse, many people still feel it is “second best” or problematic in some way. National Masturbation Month lets us emphasize how great it is: it’s natural, common and fun! This year’s theme is “D.I.Y.” Do it yourself! Nobody does it better!
One of the things I’ve noticed is that, for most guys, we learn about masturbation in our early teens and often don’t change the way we pleasure ourselves since that time. Think about it, look at what you liked when you were 13 years old. How many of those things do you like today? If you’re like most, your tastes have changed considerably, yet many of us masturbate the exact same way we did back then.
At that time our goals were to get things done quickly and quietly so that we didn’t get caught. Consequently, we learned to go really fast, be very quiet and quickly get rid of any evidence of what we were doing.
Try something new. Slow down. Take the first 10 to 15 minutes and engage your body everywhere except your genitals. Take your time a warm up; take nice deep breaths. After this introductory time, try out different strokes. We all have our favorites, but changing the stroke can bring entirely new sensations. Go slow; let go of having to be hard and allow your body to react naturally. As you go slow and take your time, you may find some entirely new and welcome sensations. When you’re done, don’t immediately reach for the towel and get up. Savor the sensations – they keep coming. Allow yourself the luxury of taking in the entire experience.