Doing it once while drunk is no big deal, but there are exhibitionists and such who will keep doing it over and over. It's one of those things where something seems harmless enough, but there's always That Guy who is going to take it to extremes. So I think the laws are motivated by a handful of recidivist offenders and catch a lot of non-recidivist drunks in the dragnet.
We also have a problem with media / media consumer biases: the media tends to sensationalize these crimes, and outraged voters always think punishments are too light.
To put some ideological points up for consideration: from (some) feminists, exhibitionism (like other forms of sexual assault) is used by men to assert power over women and from (some) men's rights activists, the laws are harsh and broad due to pervasive discrimination against male sexuality.
We also have a problem with media / media consumer biases: the media tends to sensationalize these crimes, and outraged voters always think punishments are too light.
To put some ideological points up for consideration: from (some) feminists, exhibitionism (like other forms of sexual assault) is used by men to assert power over women and from (some) men's rights activists, the laws are harsh and broad due to pervasive discrimination against male sexuality.