That's funny Roxie...I used to look good in spandex...many MANY years ago.
My boy George has the most delicate skin in the world, along with a minimal coat. He likes to play ruff and tumble with his brothers. Poor thing would look like a bait dog if he was left uncovered for 2 minutes in the back yard, so he wears puppy suits. I make them of lycra, cotton, fleece, etc depending on the season. No zippers or velcro (other dog figured out how to get him out of those for Nakid Puppy Time), but a super easy slip on and slip off.
Spirit, my current SD, wears a verson of it when we go out to work. I have issues with heavy grooming of a dog (which is why my poodle is clipped with a F7 blade) and between clips (every 3-4 weeks) he grows the tighest curls ever! The suit allows him not to pick up stuff when we are out, keeps any chemicals that I might have reactions too away from the majority of his body..and he has a sign on his butt that is 5" x 9".
Personally I like the idea of a suited dog (at least when working). No shedding on clothing racks, getting the person sitting next to you in coach, minimal fur in the back seats of friend's cars, a little something to make people "look" at the dog and realize that something unusual is in their line of sight instead of running into it (it has happened with a naked 80 lb poodle - just harness and small cape), or that it is a "special" dog so don't touch.
Spirit also will behave differently when suited up. We've had some long stays in hospitals latelty where I will take his harness off and put him in a corner somewere. He still knows he is "on duty"and responds accordingly. "Off Duty" offically happens when he is out of his work cloths. He goes from serious Eeyore face to crazy Tigger bounces.