DH does mine most of the time and if he is away or timing is not suitable I'd do it myself. So he is practically my male nurse now...he is pretty good with it now and I do think do it on the bottom hurt less for some reason.

If I do it myself, I'd do it on my thign, I bruised myself twice by doing it on my tummy plus I always think doing injection on the tummy will make it bigger, I know its not true and its silly but I just can't do it there....

Hope you find what works for you...