No back hair here...naturally too (and only about 16 chest hairs, lol). I'd say clippers are the least painful...mind you, I did my buddies back (huge favor to say the least) and as I tried to get the hair as short as possible the clipper grabbed some skin and kept digging in...damn near removed his kidney Funny thing, he never asked me again to do his back...
Back hair..nope shave that. Chest hair..groomed a little. I like my man to look like a man. Nothing sexier than a happy trail..I can follow with my...hell did it just get hot in here?!?