Types Of Hymen

Many Girls are asking the same question on my blog regarding post coital bleeding, so we decided to make a video on explaining when she will bleed and when not. That why we decided to make this video explaining all types of hymen which can be there, how to identify them and which kind of hymen will make coitus painful or will have bleeding. What is the most common site where rupture of hymen occurs normally after loosing virginity for first time? and what is the cause of hematocolpos.