I wanted to masturbate anally and my didlo is pretty long but I was bored of a normal position and wanted to try something new for deeper penetration. Put up a dildo behind me and wedged it between two boxes stacked on top of each other (no suction cup) and used pillows below my knees to adjust the height and just went doggy style at the dido moving my hips back and forth. Wanted the dildo to go deeper and this seemed like a good position for it (turned out to be an excellent position for maximum deepness). Used a latex glove’s finger to cover the thing as a condom and coconut oil as lube while doing so. Result, absolutely no regrets.