Lips are a visible body part at the mouth of humans and many animals.

Lips are soft, movable, and serve as the opening for food intake and in the articulation of sound and speech. Human lips are a tactile sensory organ, and can be erogenous when used in kissing and other acts of intimacy.

Structure

The upper and lower lips are referred to as the "Labium superius oris" and "Labium inferius oris", respectively. The juncture where the lips meet the surrounding skin of the mouth area is the vermilion border, and the typically reddish area within the borders is called the vermilion zone. The vermilion border of the upper lip is known as the cupid's bow. The fleshy protuberance located in the center of the upper lip is a tubercle known by various terms including the procheilon (also spelled prochilon), the "tuberculum labii superioris", and the "labial tubercle". The vertical groove extending from the procheilon to the nasal septum is called the philtrum.

The skin of the lip, with three to five cellular layers, is very thin compared to typical face skin, which has up to 16 layers. With light skin color, the lip skin contains fewer melanocytes (cells which produce melanin pigment, which give skin its color). Because of this, the blood vessels appear through the skin of the lips, which leads to their notable red coloring. With darker skin color this effect is less prominent, as in this case the skin of the lips contains more melanin and thus is visually darker. The skin of the lip forms the border between the exterior skin of the face, and the interior mucous membrane of the inside of the mouth.

"Lips" is the sixth single by Japanese boy band, KAT-TUN, and the third and last song to be commercially released from their third studio album, KAT-TUN III: Queen of Pirates. The single was released in three editions and as such, there are three different covers; the regular edition contains the title track, the B-side and its instrumental tracks, the first press edition came with a bonus track entitled "Message for You" and its instrumental version and the second limited edition was packaged with a DVD with the music video and a short film about the making of the PV.

The single was released on February 26, 2008 and became KAT-TUN's sixth consecutive number 1 single on the Oricon weekly singles charts & LIPS is the 9th most sold single in 2008 according to Oricon.

Song information

"Lips" was written by Axel-G, who penned "She Said..." for the group's debut album. The music and arrangement was composed by Yukihide "YT" Takiyama whilst Koki Tanaka wrote his own rap verses under his pen name, JOKER. Described by co-lead vocalist Kazuya Kamenashi as the most intense hard rock song the group had ever done, the song speaks of an obsession with a girl's "dyed red lips" and the difficult relationship they share. The lyrics go on to urge the girl not to take on all the blame for the couple's troubles and to not "let go of [his] hand". Though not present in the studio version, Kamenashi usually screams after he sings the introductory verse during live performances. The song is also the theme song for Kamenashi's television drama, 1 Pound no Fukuin, which aired on NTV.

Lips is a Dutch and German surname. People with this name include: