Source--In fact, according to a new study, going to town on your junk is actually GOOD for your mental, physical and social health for several reasons.  Check it out:

#1.)  It provides a healthy sexual outlet for people who are abstaining from sex.

#2.)  It allows those who aren't ready for sex to experience sexual pleasure.

#3.)  It promotes safe sex by guarding against pregnancy and the spread of STDs.

#4.)  It can help alleviate premenstrual tension for women.

#5.)  It can help women learn how to climax.

#6.)  It can help men learn how to control their "evacuation."

#7.)  And it increases blood flow to the genitals, which improves overall sexual functioning.

Source: University of Illinois at Urbana-Champaign