In a medium saucepan Heat 4 cups of water on the stovetop, until hot but not boiling. Soak whole lemons in water for 15 minutes. (This makes them yield more juice).
Cut lemons into halves. Using a citrus juicer, juice lemons until you have approximately 1 cup of juice. Pour into a medium-sized pitcher. (Feel free to strain seeds and pulp with a colander, but you don't have to.)
Add sugar to pitcher, and stir or whisk vigorously until sugar is dissolved. Add cold water and half of the ice to the pitcher. Use the remaining ice in drink glasses. Pour and serve. Enjoy!
Note: You can adjust the strength and sweetness of the lemonade by changing the amount of juice, water, and sugar to your tastes.