Human beings are animal ruled by desire. So it is an important element to survive getting sexual-feeling.

If we lose sexual-feeling, we cannot procreate well. It weakens national strength and a nation can ruin.

In a sense, the excitement of all men, old or young, is important when they are attracted by young or beautiful girls and wish sex.

That chemical attraction works for anti-aging. Recent research determined this sexual-feeling activate brain and even prevent a dementia.

Falling birth rate is a social problem in Japan. One of the causes is a decrease of sexual-feeling and sex drive to procreate.

But there are bunch of tools to get sexual-feeling.

For example, AV, erotic magazines, soapland, delivery-health, fashion-health, pink salon etc...

You can get sexual-feeling easily when you go or take them.

I am not sure those vents are good or bad.

Sex in 'kanji' is a combination of 'living' and 'risshin-ben' that expresses heart and feeling. Sexual-feeling is important for human beings to live and survive.