Girl, 14 years old, can't cum. Why? Is it possible because of the late onset of menstruation?

Lack of stable organisms at the beginning of sexual life is completely normal and is almost 100% prevalent. It would be amazing if you had orgasms every time you snap your fingers. There is nothing bad in this either, but it is still an exception to the rule.

It is, unfortunately, not possible to answer your question unequivocally: there is too little background information. But this is unlikely to be due to the "late" onset of menstruation.

If you are interested in understanding your own sexuality and understanding how your brain and body work when it comes to sexual pleasure, I highly recommend Emily Nagoski's book - Come as You Are: The Surprising New Science that Will Transform Your Sex Life (in Russian translation she is called Emily Nagoski - As A Woman Wants).

She is very friendly, gentle, affectionate, without the slightest condemnation and negative is given in simple terms both the scientific and the practical basis of sexual life and pleasure through the eyes of a woman and for a woman.

Although, I would recommend this book to all other genders and genders to read, but this is a completely different story ...

In short, do not spare a couple of hundred rubles and a few hours of your life on this book - such an investment in yourself pays off many times over.

Maybe because it's too early? You still have to play with dolls, girlfriend, what sex, ok.

In addition, if you don’t bother, but use a real male member to cum, then its owner is also threatened with an article for child molestation