You need to see a doctor. It is probably not an STD but you need to have a doctor examine you.
No.
cause it is...why can't it?
pooping blood
You have got a very major sex infection, or s.t.d.
You need to go and see your doctor straight away
Yes, go to the doctor and he will tell you what to do next. Spitting blood is a problem.
drink blood from peoples neck Delusional ideations are treatable in the mental health care system.
possibly probaly a good idea to go to vets!
Pooping out blood is called an "Anal Cut". Some waste pasted your hole and might have been jagged or some how hard to get out, and sometimes makes a cut. It will heel soon, but not in minutes. But you can talk to your doctor about it. It could be involved in puberty, but most likely not.
The blood indicates cuts in the digestive tract. Your dog needs surgery immediately.
An incompetent valve allows backflow of blood.
eew...you gotta be kidding me....