my experience
your body is around 98 degrees the oil cooler when it hist your muscle tissues in a cold state it starts to crystalize to the fibers, if the stuff is already warm or close to the tem of the body it will disperse more freely thinning in out with the muscle fibers. have you had a cold penicillian shot, the military used to give them in basic and mine hurt for 7 days, i once did 2 mls of test suspension warmed in the vial and it only hurt for a few hours.thats the difference, the body will accept the "viscosity" if you will if the temp is that of the core or close to it, anything cold has to be less affective for dispersion.
all in all just trust us, it works better. room temp is an average 69-74 degrees, works for some but most prefer in warmer.
I did injections in the middle east when i was deployed there and none of them hurt ever, my shit was hot when i poked the vial it always made that "shhh" sound, trying to tell me to be quiet..lol
i never had any soreness other than muscle pain from lifting(curling sandbags ) or fatigue, when my gear was warmed by the heat at about 102-120degrees.
: for the record any stories may be true and may be false, if you really wanna know test my blood, but you can have it when im dead. my disclaimer..

im gov property.. for now.

uke: