One cause of vaginal dryness is a thyroid problem. That wouldn't have anything to do with not reaching orgasm, however. If I may ask, is this a problem you're having while masturbating, or is it a problem you have when with a partner? If only with a partner, have you tried to masturbate to see if this brings a different outcome? One thing masturbation helps with is learning where you like to be touched. When you're young, most of us don't really know a lot about what turns us on and if you're heterosexual, most young men, and count me as one of them when I was young, don't really know exactly where the clitoris is and how to work with it. As they often say, we're most attractive and most interested in sex when we have no idea how to actually do it. A yeast infection can also cause dryness, as can other infections. That area is a magnet for infections. It could also be a hormonal problem. Most of this would require a doctor to do a thorough exam to see if any of the physiological reasons for this exist. I will tell you, a lot of women don't have orgasms, especially, again, younger women. Reasons can vary. Another possible cause are a lot of medications that can cause this, especially ones used to treat mental illness such as depression and anxiety. Another thing about orgasms is, you shouldn't ever try to have one. They should just come. If you put pressure on yourself during sex, it doesn't go very well. Those who have the best time with it are those who really enjoy it, make no judgments about it, are able to relax while doing it, and don't have particular expectations. Trying different things also helps. Having a partner you really like also helps a lot; sex with strangers or people you don't actually care for mentally often don't work out well. I would say, though, that if you're getting turned on and aren't generating lubrication the first place to go is a doctor.