Women prefer 30-40 minutes of foreplay. Men prefer 30-40 seconds of foreplay. Men consider driving back to her place as part of the foreplay.
Women mature much faster than men.
Most 17-year old females can function as adults. Most 17-year old males are still trading baseball cards and giving each other wedgies after gym class. This is why high school romances rarely work out. Men's magazines often feature pictures of naked women. Women's magazines also feature pictures of naked women.