One finger masturbation and ruined (kinda) big O.
It was supposed to be ruined, with just one finger, but I could not hold back and one time I started to cum I just finished myself off with full hand and jerking. It still was very weak agonorgasmos due to a way how I came with merely one finger but not as it was supposed to be. I messed up, I love to cum likewise much. O well...