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.
A significant number of social psychologists are sociologists. Their work has a greater focus on the behavior of the group, and thus examines such phenomena as interactions and social exchanges at the micro-level, and group dynamics and crowd psychology at the macro-level.