I've recently become a bit more adventurous when masturbating, as I was starting to get bored. It started off with sticking one of my fingers in my anus, going a little deeper each time, but this was awkward as I tend to use both hands around my cock. So I thought I'd got a bit further and see what else I could use. I couldn't find anything suitable for quite a while, until in the shower one day. I always get pretty aroused in the shower as it is, and usually whack one off. And this time I was able to take my time, as I had the house to myself all day. As luck would have it, I found a suitable object. It was essentially a test tube, about in inch in diameter and 6 inches long, but made of plastic rather than glass, and with a wide lip and screw cap. So I ran it under warm water and slowly slid it in. I was amazed by how easily it went in, having never had anything above an index finger inside my ass before. I pushed it in about 4 inches and if felt amazing. REALLY amazing. I thought I might as well move it about a bit, and it just got better and better. Don't think I'd ever got so hard before. After a minute or two, I inserted it as far as I dare, clenched my anus and then masturbated with both hands as usual, while standing under the shower. It didn't take long for me to come, as I was so aroused by this stage, and when I did it was the best orgasm I've had in a hell of a long time, almost as good as the first one I ever had, way back when I was about 12. Unfortunately I haven't had chance to do it again since, due to not having any time to myself. I hope to try it again soon, but I want to know if it could be dangerous or not. I'd also like to know if anyone else does this sort of thing.