Your right ,Jesus teachings never say anything about homosexuality or lesbianism.It never says anything about same sex marriage.My guess to why would be it was never considered by the people(same sex marriage).
Jesus does say this about homosexuality in these words using sexual immortality.Pauls letters to the churches get more detailed about homosexuality.
Heres the quote from Mark: Mark 7:20-23 (New International Version)
20He went on: "What comes out of a man is what makes him 'unclean.' 21For from within, out of men's hearts, come evil thoughts, sexual immorality, theft, murder, adultery, 22greed, malice, deceit, lewdness, envy, slander, arrogance and folly. 23All these evils come from inside and make a man 'unclean.' "
You do realize that Jesus of Nazareth was gay, don't you?
