Want to cut your heart attack risk in half? How about boosting your immune system by 30%? You can have these perks and more just by (ahem) getting busy.

Sex isn't just fun, it's also good for your health. AOL Health gives us 34 reasons to have sex. Some of the reasons are:

• 30 minutes in the sack burns about 200 calories.
• The physical stimulation can soothe irritability.
• An active sex life slows the aging process.
• Alleviate pain from arthritis and menstrual cramps.
• It can tighten your tummy, strengthen core muscles, and firm up your rear.
• For women, regular sex promotes a regular menstrual cycle.
• Improve your flexibility.
• For men, regular sex lowers their risk of prostate cancer.