Any cruise virgin should be told BEFORE going on a cruise that many cruise lines automatically slap you with gratuity charges.

Different cruise lines have their own "tipping guidelines" that they use to charge you. Most charge on a per person/per day basis. With all of the people that expect to be tipped, this can get really pricey -- especially for large families.

Cruisers should know that a quick trip to the Purser's Desk can have those gratuities removed from your bill, and you'll be free to tip deserving persons accordingly.