Although confused with any form of sex between a prepubescent / adolescent and an adult, pederasty refers to the practice of a sexual relationship between a pubescent / adolescent boy and an adult male. The practice has faced wide moral condemnation (against the older male - the pederast) in the 20th and 21st centuries, especially since the 1990s.
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.
Although the 30 year old man buys presents for his boyfriend of 14, it is the discreet practice of kissing, licking, fellatio and caressing which is pederasty.
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.