When I masturbate in my computer chair, I usually do so perched on the very edge, feet flat on the floor for support. It's, frankly, a little less hassle to masturbate like this; there's more space to move, I don't need to hunch over as much, and it's easier to reach my penis, whereas slumped back on a chair, I can't spread my legs as easily, so masturbating is a tricky business at best.
What it isn't is comfortable.
I mean, yes, it's comfortable to begin with - and I don't just mean that my penis is comfortable throbbing away between my thumb and forefinger. It's just sitting on the edge of a chair. But, after a while - by which I mean a long time; I usually climax in less time than that, although it varies - it does start to hurt. My arse tends to go a little numb and things begin to seize up - the remedy for which, evidently, is to stand up.
If you're naked and erect, and there's a large window right in front of your desk, this may not be the best of ideas.
Today it took me over an hour to masturbate to orgasm. I mean, I managed it all right, and (as it turns out) I didn't have to put in a lot of effort; I just hadn't engaged my brain properly. Whatever the reason, the net result of this protracted masturbation was that, for an hour or more, I had a full erection in the palm of my hand and a derrière that was rapidly growing more and more numb as I balanced on the edge of my plastic chair waiting for the volcano to erupt. And, as it's summer, it was still light outside. If I stood up someone would have been able to see me in all my gory. Er, glory.
Eventually, I stood up. I didn't have a choice, really - I wanted to orgasm and I wasn't going to do so in SUCH PAIN. So I briefly stood, for a second, shook off the blues, and sat back down.
There was nobody in the street, but just before I sat down, I caught a glimpse of my reflection in the glass of my windows...
...and there I was. Standing there, in plain sight (should anyone have been looking, which they weren't), naked from the waist down, hair a mess and flushed face, with a huge and very obvious erection. Shameless, exposed and brazen. I may not, as I rationalised after the fact, particularly like my body (with the possible exception of my eyes, my hands and my penis), but in that general haze - the combination of being very horny, very excited, and uncomfortably numb enough to want to stand up - my cares had gone somewhere.
Here's my naked body, London. Erection and all. Take me for what I am, or don't take me at all.
As I sat back down, I felt more powerful than I've felt in a long time.