Um once in a blue moon. Because it's messy. I refuse to do it somewhere that can't be cleaned easily. Frankly I don't know what the hell is coming out of me. It does have a slight very very faint piss taste, which is gross as hell, but mostly it tastes like nothing. And it's always clear. No matter how dehydrated I might be, so I know it's not pee. It's just uniquely it's own thing because it's not like my regular cum.
It's a huge build up of pressure, but really intense sexual pleasure and yes it feels a bit like holding back from pissing, but like x10. It's more acute... intense... this is like trying to explain how the color green tastes. And when you let it go it's such a relief. I don't know how some women keep doing it, I am drained afterward. Like really shaky. I need a breather afterward.
I don't know why it may or may not be popular. Well, it feels fucking awesome, so I get that. But it's kinda gross to me. It's a conundrum wrapped in an enigma.