Pederasty, as a general rule, has stayed as a structure among gays because it has many distinct benefits. For the younger man, it is an opportunity to learn from someone with more experience-- with sex and the world; it is also a way of helping the younger man as he is in a state of self-discovery. For the older man, it is first of all a chance to have sex with a twink, but moreover a chance to pass down wisdom and experience. In a life-style where you have no children, it is a chance to exercise paternal instincts.
Note: the older man is called a Pederast.
Just like sex in general, the term does not hold any power in determining the consensuality of the relationship, indeed it is used by the media to describe the statistically rare cases in which the younger 'partner' is being coerced (in which case, the Pederast is unlikely to hold the physical and emotional beauty of the boy in high regard).
A Pederast or their lover will often refer to the relationship as having a mentoring function, in which the younger partner is taught the joys of sex alongside more general pedagogic functions.
Society widely characterises the man as the dominant partner (he tends to be the one who seeks the relationship), but modern pederastic relationships tend to show a 50:50 balance, regarding who starts individual sex acts. Studies by Gerbener and Sandfort quite surprisingly show that it is the boy who penetrates the man in most cases (although penetration is extremely rare, so neither study is statistically significant alone). These findings probably represent the physical and emotional considerations of the couple - it makes sense that 1 goes into 2, not the other way around, plus the benefit of a painless induction for the boy.
Pederasty has been observed throughout history, notably in Ancient Greece and the Islamic World, in which the saying goes:
''For a boy to memorize the Qur'an, the imam has to mount him''
For high moralists and the Religious Right, it remains a thorn in their flesh that most men who have been involved in pederasty as a younger partner claim to have been left unharmed or better off.
He is also a Pederastic Ephebophile, in that he adores the slimness, beauty and immature mannerisms of his partner, yet this is not the case for all Pederasts, just as it is not always the case with with heterosexuals.