In some forms of the Christmas tradition, young children sit upon the lap of Santa Claus to tell him what gifts they would like. Around the Christmas buying season each year, many malls, especially those in North America are known to offer an area where parents can bring their children to partake in this tradition.
A "lap dance" is an erotic dance and sexual act. It is commonly performed as a paid service by exotic dancers to their clientele. A lapdance is performed by one person straddling the lap of the other and gyrating their lower extremities in a provocative manner.
There are numerous consumer devices created specifically for use with the lap. The laptop, for example, was designed for people who required the use of a computer when away from their usual work space. As portable computers grew smaller, some evolved into "notebooks", in reference to their small physical size, instead of its possible positioning during use.