Cupid:God of passion and lust.

Cupid, The cherub of love and passion.

Cupid is the Roman equivalent to Eros the  Greek of Lust.

Cupid (lust or desire) and Amor (affectionate love) are to  different names for the same Roman love-god, ( in some versions cupid is a set of twins) erith was he is the son of Venus, fathered by Mercury, Vulcan or Mars (depending on which version of the story you read.) is young Childlike figure with  wings  who accompany Venus and has also been  identified as Amores, Cupids, Erotes or other forms of  Eros.

The oldest version of cupid   is Eros, whom Hesiod categories as a primordial deity, emerging from Chaos as a generative power with neither mother nor father. Eros was the patron deity of Thespiae, where he was embodied as an aniconic stone as late as the 2nd century AD. From at least the 5th century BC he also had the form of an adolescent or pre-adolescent male, at Elis (on the Peloponnese) and elsewhere in Greece,  acquiring wings, bow and arrows, and eventually divine parents in the love-goddess Aphrodite and the war-god Ares. He had temples of his own, and shared others with Aphrodite.


Fragmentary base for an altar of Venus and Mars, showing cupids or erotes playing with the war-god's weapons and chariot. From the reign of Trajan (98–117 AD)

 

 

 

 In Elis, and  Athens, Eros shared a cult with a twin, named Anteros. Xenophon's Socratic Symposion 8. 1, features a dinner-guest with eros (love) for his wife; in return, she has anteros (reciprocal love) for him. Some sources suggest Anteros as the  avenger of "slighted love".

In Servius' 4th century commentary on Virgil's Aeneas, Cupid is a deceptive agent of Venus, impersonating Aeneas' son and making Dido, queen of Carthage, forget her husband. When Aeneas rejects her love, and covertly leaves Carthage to fulfill his destiny as ancestor of the Roman people, Dido is said to invoke Anteros as "contrary to Cupid". She falls into hatred and despair, curses Rome, and when Aeneas leaves, commits suicide.

Ovid's Fasti, Book 4, invokes Venus not by name but as "Mother of the Twin Loves", the gemini amores. "Amor" is the Latin name preferred by Roman poets and literati for the personification of "kindly" love. Where Cupid (lust) can be imperious, cruel, prone to mischief or even war-like, Amor softly persuades. Cato the Elder, having a Stoic's outlook, sees Cupid as a deity of greed and blind passion, morally inferior to Amor. The Roman playwright Plautus, however, has Venus, Cupid and Amor working together.

In Roman cult inscriptions and theology, "Amor" is rare, and "Cupido" relatively common. No Roman temples seem dedicated to Cupid alone but the joint dedication formula Venus Cupidoque ("Venus and Cupid") is evidence of his cult, shared with Venus at her Temple just outside the Colline Gate and elsewhere. He would also have featured in many private household cults. In private and public areas alike, statues of Venus and Mars attended by Cupid, or Venus, Cupid and minor erotes were sometimes donated by wealthy sponsors, to serve both religious and artistic purposes.

 Cupid's roles in literary myth are usually limited to actions on behalf of Venus; in Cupid and Psyche, one of the stories within the Metamorphoses (The Golden Ass)  by the Roman author Apuleius, the plot and its resolution are driven by Cupid's love for Psyche ("soul"), his filial disobedience, and his mother's envy.