Frenulam is a small elastic band of tissue which connects the glans to inner foreskin. In some people it is very tight causing curving of glans or causes severe pain or bleeding during sexual intercourse. In this case we have to do a frenuloplasty or circumcision. So, circumcision may seem to be a simple procedure, but it has its own complications like meatal stenosis ( the urethral meatus becomes narrowed), non-stop bleeding from frenular artery, excessive skin removal causing pain during erection. So always better to consult an expert or specialist as it is an penis is an organ of utmost importance for your sexual life.