Cushion Sex

I don't know if this is so much a technique as a device I made. I have this firm, foam cushion, foam rubber or something like that, sort of like one of those cylindrical pillows you sometimes see on people's couches, but a good deal bigger. To make a long story short, I took off the cover, cut a slit into the foam about 8 inches deep and a couple inches long. I put a plastic sandwich bag, or better, a female condom, into the slit, squirt in a good amount of liquid lube, then get on top of it or lie down beside it and insert myself. The foam is pretty dense and very elastic, so I can't even start to go in unless I'm already hard, but once I get in, it forms a snug fit around me, and it's amazing! After I've orgasmed, I just pull out the bag, the slit closed right up, and I slip the cover back on.