I’ve done this. It’s great, the nudity stuff feels amazing and it’s fascinating seeing everyone staring at you and wondering how they see you. Buuut… it’s actually really, really hard work staying still for long times. 10 minutes standing or sitting is fine, but steer clear of kneeling positions, they’re awful.
I remember the time I did it, I stupidly chose a kneeling position for my first fifteen minutes pose. I was on one knee, and after about five minutes the knee that was down started to get really, really numb. And then it went dead. Do you know what it feels like to have a really, really dead leg? It’s horrible. All I wanted to do was get up and shake it, but I couldn’t – the guy who ran the class was so nice, I didn’t want to let him down. But – you know how people who’ve lost a limb often say they still feel pain from it? This was somehow like that. I couldn’t feel it but I knew it was there – but I started panicking, thinking maybe it wasn’t there any more, or that it might never feel again! To get some feeling in, I tried clenching my thigh muscles. I did this for about two minutes, to no avail. Then I realised that every time I clenched, my penis twitched slightly. There I was, naked, struggling to stay still, twitching my penis at the poor art student opposite. God knows what he thought.
So, in short: choose your poses carefully. But do go for it, it’s great.