First, two of the female employees--a good-looking woman and a bad-looking one--took off their makeup that they had put on by themselves.

Then, as the rest of the employees watched, the artist started putting makeup on them, demonstrating her skill and turning these two into enchanting women.

The make-up artist identified a charming part of her face, highlighted it and so created an appealing face.

On the way home, at first the unattractive woman enjoyed feeling male passers-by looking at her.

When ordinary people apply makeup on themselves, they tend to put heavy makeup on parts with which they aren't satisfied with, like Japanese women do that on their eyes to make up bigger and more impressive eyes.

However, as you can already see, specialists insist that this way will make your face less attractive since the heavy makeup will then emphasize the areas you are least happy with.

It's generally held that facial expressions are important in social life.

As expressions gain in importance, makeup plays the more important role of helping you achieve impressive facial expressions.

If she is in her teens or 20s, she subconsciously hides her boobs and that part with her hands.

When my friend was working for a well-known cosmetic company, a make-up artist who was working for several popular Japanese actresses came to the company and gave a demonstration to the employees.

First, two of the female employees--a good-looking woman and an ordinary-looking one--took off the makeup that they had put on by themselves. ["bad-looking" sounds mean, haha]

The unattractive woman changed to the point where the other employees hardly recognized her, which really stunned them. ["spectators" sounds weird in this context...]

The make-up artist found out which parts of her face were attractive and highlighted them to create a more beautiful face. [alternative]

On the way home, the unattractive woman was finally able to enjoy the experience of having men look at her.

She was surprised that even young men were trying to hit on her, and it made her happy.

Usually when people apply makeup on themselves, they tend to put heavy makeup on parts with which they aren't satisfied with, like how Japanese women try to make their eyes look bigger and more impressive.

However, as you can already see, experts insist that this way will make your face less attractive since the heavy makeup can even end up highlighting your weak points.

In other words, you inevitably draw unwanted attention to it.

Speaking of makeup, it reminds me of a funny story: If a woman is taking a bath, and her male friends accidentally appear in front of her...

If she is in her 10s or 20s, she subconsciously hides her boobs and her crotch with her hands. ["that part" sounds childish]

I can't deny it. [contractions like "can't", "don't" sound more natural.]

If she is over 30, she subconsciously covers her no-makeup face with her both hands. (Alternative: You could use "bare face" instead of no-makeup face. You don't really need both hands since you put a "s" at the end of hands. )