For hobbyists, unscented baby wipes do wonders when in doubt. For providers, summer's eve has a nice wipe when you're also in doubt.
I usually ask the gent if he needs to freshen up or take a shower. If he declines, I will usually take a baby wipe and clean the area myself.
I can see Vito's side of things. Its not always easy telling someone they stink (BO) or have a funky smell downstairs. You run the risk of offending and hurting that person's feelings. I don't know about other women, but I'm very aware of how I smell. I'm also OCD about going to the doctor for female checkups though.
As a provider, we should be more aware of what is going on with our bodies.