Boyfriend kissing breast

No matter they are husband and wife or lovers, they will have physical contact after their relationship heats up, starting with kissing. During the kissing process, you need to be careful that neither party can take the initiative, and they need to slowly cater to the other. Many men will have physical movements during kissing, which is normal because it is an instinctive reaction of human nature and a physiological need, so don't panic in this situation as long as you can.

Human lips are unique. Humans have unique lips among all creatures because they are turned outwards, and the red part can be seen, making them more attractive and sensitive. However, humans are not the only ones who kiss. Chimpanzees also press their lips together to express excitement, affection or reconciliation.

Kissing can dilate pupils. A passionate kiss can cause people to secrete a variety of substances, causing pupils to dilate and eyes to become full of affection.

Two-thirds of people turn their heads to the right when kissing. Psychologist Onur of Ruhr University in Bochum, Germany, pointed out that two-thirds of people turn their heads to the right when kissing, and this behavior may reflect the preference for head rotation in infants or even fetuses.

Men love French kissing. Evolutionary psychologists have found that men love French kissing more than women. The testosterone contained in a man's saliva can be passed on to his partner. Over time, this exchange of saliva can enhance a woman's sexual desire and make her more willing to accept sex.

Women care more about breath. Scientists have found that women pay more attention to their partner's breath and teeth than men do when kissing.

The more you kiss, the closer you become. Wendy Hill, a behavioral neurobiologist at Lafayette College in Pennsylvania, found that kissing produces oxytocin, which can make people feel attached and intimate.