(Granted, if you're really a criminal mastermind, you could crop it out, but let's call it a deterrent.) Mostly, don't be a dick. You can always opt out of including your face in the frame.
That way, if anybody else sees it, you can deny it, because it's just a bunch of faceless body parts floating around on a screen. It's widely held that men are visually stimulated and women don't know how to use their eyeballs except to look at shoes and children and housework.
Famous people pull that denying-naked-photos trick all the time. If the success of , and the subsequent Channing_Tatum_explosion (I was doing research, okay?
It helps if you get excited by showing off your own body, and are eager to stare longingly at the bod of your person of choice. Remember, you're going to be moving your laptop around to get a better angle of your genitals, so I wouldn't worry too much about keeping a straight face.
Lots of advice about Skype sex will tell you that lighting and posing are very important because you want to look your best for your audience. Make sure that overhead light doesn't make you look like you're in jail. I like the way it looks, but I mostly like it for the pleasure it brings me.
I think it's more that you want to feel attractive in your own skin. It's taken me a time and a lot of work to feel that way about myself, and I'm lucky that I finally do. So even on Skype, it's considerate to follow up, especially after the first time.
But I recently started having semi-regular Skype sex, and realized that I hadn't felt this sexually inept since I was a terrified teenager.
I've had a wealth of sexual experience, and learned many wonderful and terrible things from many wonderful and terrible people.