I've been mostly smooth all over for almost 10 years now. I had played around with shaving my chest about 15 years ago, because I never liked the way the hair came in there, it was not all over my chest, rather it was like a T-bird symbol. I started just with a normal razor, but kept trying other methods, like electric shavers, but those are designed for facial hair, which is different than the rest of the body.
I also experimented with depilatory cream, like Nair, and found different ones which worked better for me., and certainly, some areas are better for this than others.
I once used this sandpaper-like pads which are rubbed in a circular motion on wherever you want to remove hair. It left things very smooth, took about as much time as shaving, but less irritating, but the pads wore out after only a couple uses, so I didn't stay with that.
As I tried new methods, I also tried shaving my stomach, and around my penis and balls, then I understand what people have said on here about how being completely hairless in this area can create an appearance reminiscent of much younger boys. My first time, for several days afterwards I couldn't get used to how it looked whenever I was in the bathroom. I hadn't looked like this since I was 11! But, I couldn't get over the exquisite feeling, and heightened sensitivity, so I kept doing it, and before long got over that pre-pubescent image. Honestly, most men don't really look like a pre-teen when erect, that changes the image. If you look at most porn performers, they are smooth. And, even so for me, and I'm far from being that well-endowed.
Then, I found the Norelco body shaver, which is designed for hair everywhere below the neck. It worked great on the areas I'd been shaving. It was so easy, and kind of fun, so I tried it on my arms, and that worked well, so I did my legs too.
I'd never been smooth all over, before, and I loved the feeling of air moving over my body. I wanted to be outside with the breeze blowing on me, so I looked for nudist places to go. That got me started in Nudism, which then, eventually, led me into figure modeling, which has been a career for nearly eight years now.
Now, I'm smooth most of the time, except during changes in the seasons when my skin needs time to adjust to warmer or cooler climate and can be dry or more sensitive for a few weeks. I do use depilatory cream in the crack of my ass, which is more difficult to do well with shavers or razors. If I use the cream on my penis and balls, like others have said, I have to be mindful not to leave it on too long or it will leave me sore with a rash-like feeling for a few days after. I sometimes leave a landing-strip just over my penis, to show what my hair looks like there, as it's still more like the red auburn color I used to have, before the hair on my head turned a darker color.
I definitely feel cleaner being smooth. The hair does hold onto sweat, oils, and whatever secretions. It's quicker to wash, too. And, when I'm modeling it shows my figure without obscuring.