i bleed when i insert a dildo (roughly 4 inches)...am standing at 1.54m, 80 kg....quite a huge appetite for sex...been doing it since i was 18....now am 25...didn't know why, nowadays when i masturbate, i bleed...A LOT!! Worrying for me...what's the cause of bleeding? I have had bigger dicks penetrating me before, but no bleeding....but this time, it bleeds when i insert a dildo... :( Help!!