This may be an indicator of a lack of arousal, low arousal, or the result of individual characteristics that are not always associated with problems with sexual arousal. If there is a lack of natural lubrication, artificial lubrication can be used. Problems with arousal and satisfaction in women can often be resolved. Individual sex preferences should be openly discussed and what promotes sexual arousal and satisfaction. Stimulating a woman with your hand or the hand of a partner, cunnilingus and other various forms of sex can be done at any time, and not just as a foreplay. With manual stimulation, oral stimulation, and masturbation, most women are more likely to have orgasm than with vaginal sex. The experience of masturbation before the onset of sexual relations reduces the likelihood of a woman's problems with orgasm; it is also useful to try masturbation in the absence of orgasm in order to learn how to get it, including if there has been no experience of masturbation yet. In case of problems with arousal and satisfaction, you can also look at the following links:
Some girls don't really care about sex, even if they are really in love. Well, this is in short, but you will not find a more detailed answer than that of Alexander Moiseevich anywhere else
Lecture for two hours, so I will write the main thing on your question: when meeting, immediately ask if a girl was masturbating as a teenager? If the answer is NEVER - then then do not ask why it does not flow, here. Because he doesn't want to, so it doesn't flow. And if the girl answers, yes, of course, then normal sex is only a matter of time and how much she likes you. Alexander Moiseevich will not lie.
If at all a recent acquaintance, then give her the opportunity to get used to you, to loosen up and relax - then everything will be fine ........
There can be many reasons, for example, some girls do not physiologically release a large amount of lubricant, but still it is enough for sexual intercourse, perhaps the girl cannot relax and she is tormented by extraneous thoughts, well, or there is no excitement as such, you can stretch foreplay, each girl needs a different time to "get wet" and the fact that a girl does not flow like a river does not mean that she does not want you. Physiology is a strange thing.