My longest NN was a whole month as a heartbreak being the impetus for it: this smelly, hippy, dude-girl that I completely bought into kicked me to the curb, and it hurt so much that I didn't beat the monkey for weeks. I don't remember experiencing any bodily phenomenon, though. About 4-5 years later, when I was randomly thinking about it one day, it started bothering me that my longest streak came about due to getting my heart stomped on. So, I went on a no-mast mission again just to cleanse and reclaim that record for myself. Beat the streak by about one day until "Rita G" brought me to my knees and I gave. The only thing I remember was that my testes felt sore sometimes, and for me, arousal levels eventually kinda waned away when I got use to not having sexually stimulating thoughts.