Arboreal locomotion small branches, as they may wrap too far around and prick the animal's own paw. Adhesion is an alternative to claws, which works best on smooth surfaces. Wet adhesion is common in tree frogs and arboreal salamanders, and functions either by suction or by capillary adhesion. Dry adhesion is best typified by the specialized toes of geckos, which use van der Waals forces to adhere to many substrates, even glass. Frictional gripping is used by primates, relying upon hairless fingertips. Squeezing the branch between the fingertips generates a frictional force that holds the animal's hand to the branch. However, this
Non-reproductive sexual behavior in animals one of these two bonding. Homosexual parenting is very common, especially in birds. Homosexual pairs have better skills and larger nests than heterosexual pairs. Homosexual pairing can occur different ways, one example would be two female animals with offspring coming together and helping each other raise their offspring. Genital-genital rubbing, or GG rubbing, among non-human animals is sexual activity in which one animal rubs his or her genitals against the genitals of another animal. The term "GG rubbing" is frequently used by primatologists to describe this type of sexual intimacy among female bonobos, and is stated to be the "bonobo's