When my parents were out of town for two weeks, I decided not to masterbate until they got back. (I was testing myself to see how long I could go without jacking off). On the third day I was going crazy and I almost cummed that night.
On the fourth day I couldn't sleep that night because I needed to jerk off, so I said to myself I can't do this. So I went to the bathroom, grabbed some lube and jerked away. The orgasm felt so good I cummed all over myself. Even though the orgasm felt so good I'm never doing that again.