While receiving a hand job it's not necessary for the guy to orgasm or ejaculate, although it is possible. Some couples use hand jobs as just one part of their sexual foreplay; others consider a hand job to be the main event of their sexual experience.
The penis is the most sensitive part of a male's body and reacts to touch, temperature and pressure. However, the glans (also known as the head) is the most sensitive part of the penis. Both circumcised and uncircumcised penises can get pleasure from hand jobs.