I posted this on another thread just recently but you might find it interesting. If you are looking for perhaps a possible explanation for the origin of Satan (at least his physical description). The Pagan "horned god".

Horned gods, with horns or antlers, appear in various cultures. The "Horned God" is a modern term for a syncretic god of late antiquity, the merging of Cernunnos, a horned god of the Celts, with the Greco-Roman Pan. This combination of gods produced a powerful deity, around which the pagani, those refusing to convert to Christianity, rallied.This deity provided the prototype for later Christian conceptions of the devil, and his worshippers were cast by the Church as witches. In Wicca, the Horned God and his counterpart the Triple Goddess are the main gods worshiped.

The "Horned God" is still worshipped by some modern Neopagans, particularly Wiccans, who have linked him with a wide variety of male nature gods from various mythologies, including the English Herne the Hunter, the Egyptian Ammon, the Hindu Pashupati and the Roman Faunus. All of these male deities are seen as having horns and an association with nature. A number of figures from British folklore, though normally depicted without horns, are nonetheless considered related: Puck, Robin Goodfellow and the Green Man.

The syncretic figure of a Horned God, central to a cult of witches, was first suggested by Jules Michelet in La Sorcière (1862); these ideas were expanded by Margaret Murray, in The Witch-cult in Western Europe (1921). Since then important aspects of Murray's thesis have been discredited, and the idea of a highly organised pagan underground resistance persisting into the early modern period is widely regarded as a fantasy. Despite widespread condemnation of her scholarship, certain intuitions of hers are now considered correct,and most witchcraft historians agree that beliefs and practices originating in paganism survived into the Early Modern Age, and that the conflict between these beliefs and Christianity helped precipitate the European witch-hunts.

The horns (on any deity/spirit)symbolize "ancientness".

I thought it just meant they wasn't getin' any.

Thats probably what it means nowadays In the ancient past it was used to symbolize "a being of great age".

Thats probably what it means nowadays In the ancient past it was used to symbolize "a being of great age".

If thats indeed the case, I would guess its because animals that have horns like deers with racks and rams with horns. This requires years for them to grow so maybe its just the comparison to the animal.

Any idea why that particular association? Horns with age? Those kinds of things are usually not completely arbitrary. There's almost always some reasoning behind them.

[edit: Looks like Krimsa answered the question while I was composing it. Thanks K. ]

If thats indeed the case, I would guess its because animals that have horns like deers with racks and rams with horns. This requires years for them to grow so maybe its just the comparison to the animal.