Like literally just lay on my front spread my buttcheeks and let them go in, all the way in, until the end. I know I likely can with not too much effort after the initial penetration, but thats the part i find the hottest, the first thrust, that feeling of pain but knowing theres nothing i can do. Other that my body produces enough "muccus" to allow for sex with no external lube. I almost never use real lube, just finger myself a bit before and let them go in, they usually tell me it feels super good because its tighter. I still barely feel a thing with just a dick.