Sometimes I tend to be a little to open with things, and this has been a topic. Keep in mind it has a few factors. But in short I will just say from now on, seeing how you were not aware and don’t believe me that it ‘Will happen’ you just need learn how. Then I just tell them to come watch. Seriously it’s crazy at how different it feels. And depending on the experience level of the person doing it; the pleasure intensity can vary as well. Personally, I have had several different partners that have known how. And I will just put it this way. And with assumption that like me if the one doing it knows that males are multi-orgasmic. With just continual stimulation , the erection is maintained and orgasms just keep coming. It’s been a while, but it used to be fairly often. So I can’t say much about the best, longest, most, fastest, etc. But it is an effect way to torture the recipient into get what you want. Just think ladies. You don’t even have touch his penis, just shove a vibrator his ass, hit that spot and it may only take one and he is putty.