Can we talk about your butt for a sec? First, she looks amaze. Second, she's low-key complicated. Allow me to get into a quick human anatomy lesson: Your glutes are made up of three muscles: The gluteus maximus the round part of your butt , gluteus medius your side butt , and gluteus minimus your under butt. Together they help you stand, lean backward, do a plank, squat, walk, and other really important things, says Charlee Atkins , C.

How many answers do you know? And, the answers to the quiz will be at the end. Being informed about your anatomy—knowing where things are located in your body—is an important first step for anyone having anal sex. During anal sex, the penis or dildo, or whatever is inserted into the anus, past the external and internal sphincter muscles, and into the rectum.

But butt stretches can loosen up your tight tush, fast. The tight, sore feeling can simply be due to not moving enough, Cameron Yuen , P. Just like the muscle, these nerves need movement and blood flow. Short-term, spending too much time sitting on your butt can make you feel really stiff in the muscles in front of your hips, or your hip flexors. This puts you in a position where the tightened, shortened muscles pull your pelvis forward, causing your lower back to hyperextend, or arch, Yuen explains.

Training and stretching your ass takes practice and patience. Whether you want to have anal sex, use bigger dildos, or you simply enjoy feeling stretched, the same principles apply. But if you want a more exact idea of what size you should begin with, play with your fingers.