Is Pre Marital Sex forbidden in Judaism? In Christianity it is.
Not only pre-marital sex is forbidden but also having relations with your father or mother, or your father and mothers spouses or your sister or brother, or your mother and fathers other children (if any).
There are many forbidden relations, of course including homosexual relations too..
http://www.torah.org/learning/halacha-overview/chapter27.htmlE. Holiness - Kedushah
"In the fifth book I will include commandments regarding prohibited sexual relations and prohibited foods, since in both of these matters G-d sanctified us and separated us from the nations, and regarding both of them it was said `And I separated you from the nations to be mine ... Who separated you from the nations'.1 And I have called this book the Book of Holiness."
1. Lev. 20:24,26
27. Forbidden Sexual Relations - Issurei Biah
a) Arayos
The Torah forbids sexual relations between a man and his 1) mother1 or stepmother2; 2) aunt3 or wife of father's brother (on the father's side)4; 3) sister, half-sister,5 or sister-in-law6; 4) daughter, daughter-in-law,7 or granddaughter8; 5) wife's mother, grandmother, daughter, or granddaughter.9,a The relatives by marriage are forbidden even if the marriage is no longer in effect, except in the cases of a brother's wife if the brother died childless, and a wife's sister after the wife's death. The prohibitions apply to both the man and the woman.b
The sages extended these prohibitions to include a man's 6) grandmother, great-grandmother or step-grandmother; 7) father's or mother's half-brother's wife; 8) great-granddaughter, and son's, daughter's or grandson's daughter-in-law; 9) wife's great-grandmother or great-granddaughter; and the relatives (mother, grandmother, daughter, granddaughter, sister) of a woman with whom the man has had sexual relations. Some of these apply also to further generations.c
The Torah also forbids sexual relations 10) with a woman married to another man10; 11) with a woman who has menstruated, given birth or miscarried, until after she has immersed herself;11,d; 12) between two men, with additional prohibitions in the case of one's father or father's brother12; 13) between a man or woman and an animal.13 All of these Torah prohibitions are called arayos ("nakednesses").
Topic: Pre Marital Sex and Judaism (Read 3317 times)