STD's are very dangerous obviously. An STD is a Sexually transmitted disease that is transferred from one person to another during oral sex or Sexual intercourse. An STD can kill you depending on the STD you have. If you have HIV you can die from it. STD's burn and or hurt a lot during certain things you do such as use the restroom etc. It is best that you go to see a doctor if after Sexual intercourse it burns or hurts when you use the restroom
