I got a tight what? If you're experiencing pain with penetration, one of the main reasons could be from pelvic floor muscle tension. When these muscles that surround the rectum and vagina shorten (or are overused from anything like poor posture or straining to poop), it can cause pain when they are forced to lengthen… like when something is inserted into the vagina. Simple breathing exercises and stretches can help these muscles to elongate and open. Follow along to learn these exercises and give your pelvic floor muscles the TLC they deserve.