A man can pull out as a way to prevent pregnancy when no other birth control method is available. Pulling out allows for sexual spontaneity. Withdrawal doesn't cost anything. If you have great self-control, experience, and there is trust between partners, pulling out can be used more reliably.
Determining Basic Caloric Need. To estimate how many calories you should consume daily to support basic metabolic functions such as sleeping and breathing, first determine your weight in kilograms -- divide your weight in pounds by 2.2. Next, multiply your weight in kilograms by your basal metabolic rate -- 0.9 if youâre a woman.
The number of calories your body uses to carry out these basic functions is known as your basal metabolic rate â what you might call metabolism. Several factors determine your individual basal metabolic rate, including: 1  Your body size and composition. 2  The bodies of people who are larger or have more muscle burn more calories, even at rest. 3  Your sex. 4  Men usually have less body fat and more muscle than do women of the same age and weight, burning more calories.