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.
In addition to the factors that influence BMR, two other factors regulate how many calories your body burns each day: 1  The Thermic Effect of Feeding (TEF) is the amount of calories you use to digest, absorb, transport, and store the food you consume. 2  This accounts for about 10% of the calories used each day.