The Bible says that "You shall not lie with a male as one lies with a female"
4
I wish I could have gotten in on this sooner. After reading all the comments, I'm dismayed to see how many people (especially Christians) don't understand that the Old Testament laws were for the Israelites some 4000 years ago. The vast majority don't pertain to us today. They were put there to show how God made a covenant with Israel, and there had to be a 1st covenant in order for there to be a 2nd covenant (Christ).
HOWEVER the New Testament also talks against homosexuality (Romans 1:26-27, 1 Corinthians 6:9-10).
To those who said that the Bible shouldn't be used to create laws, sorry you're too late. That's what our original laws were based on. And it's sad to note that even the non-christian founding fathers (and others who lived at that time) knew the Bible better most Christians today.
But, you don't have to quote scripture to explain how wrong same-sex relations is. Any sane, sensible human being should be able realize that homosexuality a despicable perversion. Should we hate them? Of course not! We should show love and compassion to them, but hate the sin, and certainly not encourage their actions.