I love this site! Sharing something other men may not have tried
I don't know how many other men have found out, but our nipples are major erogenous zones and great for self pleasure.
I discovered this one day about 10 years ago after reading an erotic story by and about a woman who got off just by playing with her nipples. An aside in it said some men could too. I was intrigued and tried it.
I stripped off, found some massage oil and started to rub it over my nipples. They stood up at once and the sensations generated amazing erotic feelings and metal images. I kept playing with them and got rougher and rougher eventually pulling on them quite hard it felt so good. Eventually I was on the brink of cumming and grabbed my cock. I came very hard indeed.
Since then I have refined the technique and a few times and have even made myself cum with just playing with my nipples: it is quite hard to do because as climax approaches the urge to grab the cock is huge. If you can hold off eventually you will be rewarded with a mindblowing orgasm. Another trick is to use an electric toothbush on my nipples, or two one on each. This can produce very swift very intense erotic feelings.