A sexual pleasure pretty well all enjoy is a good handjob, man or woman. Some I talk to are not able to cum from intercourse alone, and it has to be by hand to get them off.
Of course most of us learned about what an orgasm is like by masturbating ourselves and knowing what feels good to us, so a hand job by another person is usually our first introduction to sex. Many a young girl might not be willing or ready to give herself fully to her first boyfriend, but chances are good she’s willing to give him a handjob, that’s pretty well the first step. Then oral, then intercourse, but if the people involved are young enough, they may not be ready for a full fledged sexual relationship, so it may stay in handjob territory for a while.
It’s pretty innocent and feels good and different having someone else touch you in a way you are only used to touching yourself. The hand can have a firmer grip and touch than any blow job or intercourse, and indeed some men that have not had much experience with women are so used to their own hand they find they are unable to cum any other way than by hand. Their own or that of their partner.
Using our hands on another person to give them pleasure is a nice experience, and often in massage parlors clients expect a “Happy ending” to their massage, since it feels so good getting their bodies rubbed down, they want a nice orgasm to cap things off. Seems a natural way to end a massage.