Need information about nipple orgasms!!

Please link me to any relevant information on nipple, breast, or non-ejaculatory orgasms that ISNT talking about anal.

So I was discussing nipple orgasms with my cousin. And I was explaining to his shock that I was capable of having multiple nipple orgasms, (mistruth. I have had multiple dry and mini-o's, but no nipple yet) and he couldn't believe it.

I explained how you plateaued for some time, and then the feeling would slightly go away, but within seconds it can plateau again.

His responce: "Do you even know what an orgasm feels like? You must not!"

He said he never has heard of anything like that. The only thing similar he heard of was "double orgasming". Where you cum... Twice..

So please, if you have any links or articles about nipple orgasms, please share them, because I told him I was going to look up info for him. (Also, I am specifically looking for nipple orgasm information that doesn't talk about anal stimulation. I can't give him the impression I have done that.)

Thanks