In an earlier post, a provider said that unshaven (face and groin) guys were displeasing, to put it nicely. I have to admit that I am so naive that I never even considered shaving anywhere but my face.

Is this generally the preference? And if so, where do you stop? Should I draw a line around my tighty-whities and shave everything inside it? I'm gonna look pretty silly at the gym.

Just the balls and a little around the whole package.  Spurge on a mankini wax job - back, crack and sack as they say in the biz.  Just be prepared for rimjob job mania your a-hole will encounter.

Any suggestions on where to go for a back crack and sack job?

That's fuckin funny!

LOL!