Not much of anything to ‘Guy Thing’
There are a few stereotypes which neither sex seems to mind perpetuating. Men are deathly afraid of marriage. A bachelor party isn’t complete without strippers. It’s better to take chances than settle for a middle-class life. Each of these elements plays a component in the plot developments (such as they are) of the comedy “A Guy Thing,” but none of them are fleshed out in a manner that’s even vaguely interesting, much less plausible.