(protected of course) sex has many benefits:

lower mortality rates.

Reduced risk of prostate cancer.

Improves posture.

Boosts self esteem.

Makes a person feel younger.

Firms tummy and buttocks.

Keeps spouses connected emotionally.

Offers pain-relief.

Gives people a positive attitude on life.

Reduced risk of heart disease.

Makes a person more calm.

Improves fitness level.

Makes a person less irritable.

Reduced depression.

Improved sense of smell.

Has a therapeutic effect on immune system.

Better bladder control.

Relieves menstrual cramps.

Helps people sleep better.

Improves digestion.

Healthier teeth.

Helps folks remember more.

Produces chemicals in the brain to stimulate the growth of new dendrites.

Lowers the level of cortisol, a hormone that can trigger fatigue and cravings.

Lowers feelings of insecurity.

Increases level of commitment.

Less-frequent colds and flu.

It can help people achieve weight loss since about 200 calories are burned during 30 minutes of active sex.

Studies are also showing that it is a myth that abstinence can sharpen a person's competitive edge



taken from:
http://marriage.About.Com/cs/sex/a/sexfreq uency.Htm