After reading the posts, I agree that leaving a razor out to dry is important. After drying and oiling my razors, I leave them out the rest of the day before putting them in my razor storage box (which does have desiccants). I am in a high humidity area, thus I use oil as an extra precaution.
If there is any moisture on a razor and the razor is placed in an enclosed space, I believe there is a risk for spotting or rust. I am even becoming more and more leery of using enclosed leather cases (like the beautiful ones provided by Thiers-Issard) except for short-term use when traveling.
Several years ago, I was given a beautiful two-handed Broadsword with a leather scabbard as a gift. The instructions were very specific:
"Do not use this leather scabbard for storing the sword - rusting and pitting can result. The scabbard is best employed when actively using the sword or for protection when traveling short distances. Avoid storing the sword in an enclosed box. For maintenance, it is recommended that the blade be lightly coated with Camellia oil or Renaissance Wax. Warning: This sword is not a toy and should be handled with care. It's sharp edges can result in injury."
If one keeps a razor absolutely dry, oiling probably is not necessary except for long term storage. I just like to be on the safe side.
Happy Shaving!