Is it time to grow up?

Next weekend, I'm spending a couple days in Prague. A friend at work is getting married this summer to a nice Polish girl. It was his last wish as a single man to have his bachelor party in this beautiful city. My question for you is this: I'll be turning 33 in a couple days. At what age does your mom stop telling you things like, "Have a good time in Prague, but be sensible."?