pederasty (n.)

"carnal union of males with males," especially "sodomy of a man with a boy," c. 1600, from French pédérastie or directly from Modern Latin pæderastia, from Greek paiderastia "love of boys," from paiderastēs "pederast, lover of boys," from pais (genitive paidos) "child, boy" (see pedo-) + erastēs "lover," from erasthai "to love" (see Eros). Related: Pederastic.