Sex is often the end result of emotional and physical attraction, but it's not the most important aspect.

So, in parallel, Christianity, since it advocates the religious ceremony of marriage between a man and a woman, must also be inherently sexual in nature.

I hope it is not too arrogant of me to assume that you are straight because I cannot fathom a gay person arriving at the conclusions you have arrived at.

Working under this assumption, would you say then, that any relationship you had with a member of the opposite sex was inherently sexual in nature?

Again, give me a break.

You can love someone and want to be with them for the rest of your life and not want to have sex with them. It really isn't a stretch of the imagination.