Handjob
A handjob (also spelled hand job) is a manual sex act involving a person stimulating the penis or scrotum of another by using the hand. This is done to induce an erection for sexual pleasure, sexual arousal and may result in orgasm and ejaculation. A handjob can be performed as either foreplay or as non-penetrative sex. It is analogous to fingering (manual stimulation of the vulva or vagina). Someone may give a handjob so as not to engage in penetrative sexual activity. Besides avoiding the risks associated with sexual penetration, such as sexually transmitted infections (STIs) or pregnancy from penile-vaginal sex, some people engage in non-penetrative sex to preserve virginity. Practice

General
The main aspect of a handjob is manual stimulation of the penis by stroking with the hand, rubbing with the fingers, or some combination. One common technique is to move the hand (or both hands) up and down on the shaft, glans, and frenulum. The movements and speed of the action may vary. Personal lubricants are often used. Others may also use their hands and fingers to stimulate the scrotum by rubbing, stroking, pulling, or even manipulating the testicles. Prevalence in massage parlors

In some massage parlors, a masseuse, whether as part of the massage itself or directly after it, may perform a handjob on their customer. This is sometimes known by the euphemism  "happy ending". An investigation by Time Out New York in January 2011 found many New York City massage parlors advertising "sensual massage" and providing handjobs. The parlors charged from $60 to $160, with an extra tip for the sex workers (usually $40) for a massage and manual "happy ending". Most of the massage parlors reviewed were "rub and tug joints" where handjobs were the only sexual services provided, and there was a strict policy of the male clients not touching the female workers. See also

Fellatio
Footjob
Hand fetishism
Jerking off/wanking – manual stimulation of one's own penis as a form of masturbation

References

  
 
 "In all I read sixty-five sex advice books...I also looked at a large number of newspaper problem pages and websites. My colleagues...studied sex-related TV documentaries and magazine articles.[... ]On average around 17% of the books I looked at were dedicated to PIV [penis-in-vagina] intercourse, compared to...4% on manual sex (using hands)"
 
 
 "Great sex without intercourse", NVSH (contains graphics of sexual acts)

Sexual acts
Erotic massage
Non-penetrative sex
Manual sex