Which means you prooobably have a few questions. Using lube is a must during anal play, Joseph Frankhouse , M. Anal penetration without adequate lubrication can cause the tissue in your anus to tear. Not only is that painful, it also makes you more susceptible to sexually transmitted infections , like gonorrhea and HIV , board-certified ob-gyn Jacques Moritz, M. Still, adding a ton of lube to the mix makes you less likely to tear and more likely to have fun.