Usually in my room; while I have done it in even the weirdest places (like in one of my uncle friend's restroom during a party XD) I stick to my house, my room, and most of all alone if possible (though I have done it lately with others in the house, just at night). In front of the PC I get access to good material for me to enjoy myself, but if I have done it more than once per day, I can relax on my bed or so and let me go all the way since I know I won't end up making a mess in my bed, though I still put on a towel just in case.
