The air is still fresh; hardy foreigners can head to the beaches on the Lido (where some businesses are still closed). May is really the best month for seeing Italy, with its sunshine, comfortable temperatures and flowers (not so many of these in Venice, of course). Good points: sunshine; comfortable climate.
Weddings are a heightened example of what sociologist Erving Goffman called front stage behavior. Goffman viewed social life as something akin to a performance, where we attempt to manage the impressions we make to others.
An example of the difference between front stage and back stage behaviors would be the type of customer service embodied by baristas at the local coffee shop. While on the clock and in front of customers, baristas will typically do what the customer wants and try to look untroubled by obnoxious requests.