Some time ago I remember watching a 2 on 2 scene in a Brazilian porn movie. And one of the guys in this scene kept masturbating the blond girl's pussy with his hand as much as possible throughout the scene. He even managed to reach way down and masturbate her pussy when she was on her knees sucking his cock.
This guy must've had a well-lubricated hand and his technique must've been good. Because this blond lady seemed to be on the virge of orgasm throughout the scene. Once in a while she moaned and involuntarily thrust her hips forward in response to his restless hand on her pussy. And once in a while she lost control letting go of the guy's cock and grabbing his masturbating arm instead. Her face was flushed, her eyes were glistening, and her sexy lips were red and full.
I didn't see this lady orgasm. But watching her obvious sexual arousal, excitement, and pleasure was quite a turn on for me. Her pussy was juicy. And it looked to me like she had a lot of fun taking both guys in her pussy again and again in a variety of positions.
This kind of sex action on the girl's pussy I've never seen in any American or European porn movie. And that's too bad. Why do so many American and European ladies have to fake their sexual excitement and pleasure, when there is a perfectly good way to make their pleasure and excitement real, genuine, and sincere?
From my own experience of masturbating several women with my hand, I can say that having a well-lubricated hand is important. The woman's pussy lips must be well-lubricated too. And instead of masturbating the woman's clitoris directly, the guy should try to make the lady's pussy-lips slip and slide around her clitoris. Occasional contact between the guy's hand the lady's clitoris is good. But a lot of her clitoral masturbation should come from her pussy lips slipping and sliding around her clitoris.
All of the women I've been with orgasmed every time, when I used this technique on them. Some of these women tried to hold back their orgasm because they were expecting to fuck and didn't want to orgasm too early. But I found that none of these ladies were able to hold back for long, if I kept masturbating them. When a woman is holding back her orgasm, then sometimes all you need to do is grab one of her nipples. This distracts her attention. She looses control and orgasms right there and then.
I sure hope that American and European porn makers will introduce this kind of male hand on the woman's pussy masturbation technique. Genuine sexual arousal and obvious sexual pleasure of female porn stars would be a huge improvement over the fake cries and insincere acting you often see in today's porn movies.