I started playing with my right hand nipple once when i was jerking off, now I can’t stop playing with it every time i jerk off. My nipple has become so hard compared to the other one. It’s like a knob inside under the nipple. Wonder if it’s ok or is there something wrong…

I can cum no hands if my nipples are worked

My nipples aren't sensitive, but I do love a guy's fingers going through my chest hairs.

Had a neighbor boy same age as me when growing up. At around 13 years of age, we had been jacking each other off, sucking some and fucking a little. One day, in his room, as I was jacking him off I started to suck his nipples. Biggest cum I ever saw him have up to then occurred. Then he did my nipples and I had a great cum too. Was part of our routine from then on until I moved away.

Does nothing for me... It can be an irritation too...

I love sucking other guys' nipples and I like it done to me as well

Oh, pinch my nipples and I'll do anything for you.

Oh hell yes, sucking my nipples or stimulating them while jerking me off makes me blow my load extra hard.

Touch my nipples and I get an immediate hard on. When I'm turned on my nipples always get hard.

It has indeed been discussed here before. The short answer is that the reaction to male nipple stimulation is all over the spectrum. Some men feel almost no pleasure from nipple stimulation. For others there seems to be a direct connection between their nipples and their cocks. Nipple stimulation can cause an instant erection. I fall into the latter group.