Physical intimacy

Physical intimacy is informal proximity and/or touching, usually between two persons, where their positioning and/or touching is an expression or result of intimate feelings (such as close friendship, love, and/or sexual attraction) which they have for each other. Examples of physical intimacy include being inside someone's personal space, holding hands, hugging, kissing, caressing, and sexual activity.

The forms of physical intimacy, in order of increasing degree of intimacy (but not necessarily in order of increasing enjoyment), with each form generally including those preceding it, are: physical closeness, touching (especially tenderly), touching intimate parts (including outercourse), and sexual penetration.

Intimate proximity
It is possible to be physically intimate with someone without actually touching him or her; however, a certain proximity is necessary. For instance, close proximity and sustained eye contact is a form of physical intimacy. When there is nudity, but still no contact, the degree of physical intimacy is heightened. For instance, there is a game in which a couple may try to see how close they can get to each other without actually touching. Another game involves running hands along the countours of a person's body without touching him or her. These techniques often heighten sexual arousal. When a person enters someone else's personal space for the purpose of being intimate, it is physical intimacy, regardless of the lack of actual physical contact.

Affectionate touching
Touching may include:
 * Holding hands
 * Interlocking arms while walking
 * Bear hug: gently enclosing the arms around the trunk of each other or holding them against you
 * Sitting on, sitting near or lying against another person, resting one's head on the other's shoulder, lap, etc.
 * Caressing (petting): gently stroking body parts or hair with a hand
 * Cuddling (From Scots)
 * Massaging a part of, or the whole body
 * Kissing
 * Licking

When speaking of physical intimacy, touching is rarely violent, unless the participants enjoy BDSM. Then touching may include:
 * Punching
 * Slapping
 * Kicking
 * Biting

Whether a person is wearing clothing or is nude also plays a role. In particular, touching with clothing tends to be more intimate if the layer of clothing at the area of contact is thin and flexible. The layers may be reduced or eliminated even without undressing by touching under someone's clothes. Objects, especially hard or large ones, such as big buttons, zippers, piercings, jewellery, and objects in pockets, may somewhat obstruct intimate touching.

The objective of physical closeness can be a mix in various proportions of desired intimacy and practical aspects, such as lack of space, softness, stability (e.g. in a moving vehicle), and keeping warm; e.g. somebody sits on somebody else's lap, or sleeps leaning on somebody else. Physical closeness may also be involuntary, as in a crowded train or elevator. See also frotteurism, groping. Another form of this kind of closeness is when one goes to a crowded place for entertainment: a bar, disco, pop concert, street festival, etc.

A cuddle party is a party where strangers cuddle, touch, caress, and massage, subject to rules such as no nudity, no hands under clothes, no French kisses and no dry humping or other sex. National Hugging Day was founded on January 21, 1986. December 4 is considered International Hug Day.

Physical intimacy between a human and an animal may involve petting (caressing), hugging and playing.

Also a person, especially a child, may caress and hug a teddy bear or doll. There are also sex dolls, as a surrogate for a person.

A personal relationship that does not involve sexual behavior, e.g. friendship, may involve physical intimacy. This varies greatly. In western culture it is more common among female than among male friends; the latter may want to avoid associations with homosexuality. In other cultures, such as Arab culture, men may hold hands with no implication of homosexuality. Many East Asian cultures typically encourage relatively little body contact between friends, acquaintances, and members of the same sex. Even among family members and spouses, traditionally, there are fewer public displays of affection.

A man and a woman who are friends may avoid physical intimacy to avoid associations with sexuality or emotional intimacy, in order not to appear to be in a sexual relationship. This is especially true if one or both of them is already in such a relationship with another person.

Sexual physical intimacy
Sexual touching,, also called "heavy petting", involves touching or caressing of a person's intimate parts. Examples of sexual touching include sensual massage, feeling and kissing a woman's breasts and mutual masturbation.

Sexual intercourse is generally considered the ultimate form of physical intimacy.

For a comprehensive overview of sex acts and practices, see the article human sexual behavior.

The baseball metaphor

 * Main article: Baseball metaphor

One subject often used as a metaphor for physical intimacy in American English (especially to describe the level of intimacy achieved in intimate encounters) is the game of baseball. In the baseball metaphor, the intimate encounter itself is compared to the act of running the bases:
 * 1) Holding hands or kissing is considered getting to first base.
 * 2) Kissing and/or light petting means reaching second base.
 * 3) Heavy petting means getting to third base.
 * 4) A "home run" means you went "all the way" and had sexual intercourse.

This metaphor is not commonly known to be used outside of North America, even though baseball is widely played in nations like Cuba and Venezuela.

Other forms of intimacy
Other kinds of intimacy include:
 * emotional intimacy: talking about emotions, empathy and sympathy between two or more people.
 * financial unity, sharing property, community-property