Answer:
I travel in a gaggle.
Deposit red liquid in me.
I have two bodies joined together as one. When standing still I run and run.
I am easy to see but no one likes looking at me. Without me there would be no you. I can make you complain or make you happy. But you almost always take me for-granted.
I am a nut with a hole. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?