It's a bit extreme to swap torsos, but... more mild editing is hardly uncommon when photographing non-famous people. Most clients probably don't want pores and pimples showing up in their wedding photos, for instance -- and if you use a soft-focus filter, you're sacrificing lots of detail, not just skin imperfections. Annoy the client by making him look uglier than he wants to portray himself, and perhaps you've cost yourself some prints and gotten some bad word-of-mouth.

/Corollary: professional photographers should be careful how they pose "big-boned" clients.