I have to write a sex scene?

Those who say that writing a novel comes naturally have never written a sex scene. I don't think this would be nearly as awkward if my father hadn't read the beginning of the story. I keep thinking "What happens when he reads this?" Awkward central. Anyways, I'm feeling completely overwhelmed by this task, hence the procrastination.

I know I'm not particularly eloquent on this blog, as it is my personal blog. Please be advised that my writing style is much more cohesive when I'm trying to tell a story. :)