>using different needles to draw and inject
Why does one need to do this, exactly?

easier, plus piercing the membrane damages the needle tip slightly so injecting into you after isnt as smooth.

needles are cheap and cross contam is real as fuck. staph infections are fucked, anon

You can draw with a small needle, it just takes longer. I just use insulin syringes and dont bother with buying multiple gauges.

>>40270580 (OP)
if you basically just touch a needle it looses sharpness and causes irritation.

Also drawing with a thin injection needle take a long time

>>40270655
I bet your injection sites look like the surface of the moon