If someone tried to give my daughter a shot there, I'd have a fit. I've seen in the delts, glute, and outer thigh. However my daughter is petite, she has better abs than I do. NO shit. whats wrong with the outer portion of your thigh or a glute? Try not to reinvent the wheel if possible.
Did you lose a bet?
BUT,this can be done. Technically you can give an I.M. into any muscle region as long as you avoid contact with the nervous and vascular systems.
I guess I am a wussy but I even cring at the thought of going more toward the the rectus then the vastus lateralis.
There are a few reasons certain site are tought in school, 1. good blood supply, 2. away from nerves, and 3. COMFORT.
P.S. I hope they didn't double dog dare you to use a 16g 1 1/2" too.