Hey, I'm a virgin and as such never had sex etc etc.

I really struggle to get through a sex dream it always ends just as I'm getting close to penetration.

Today though I had a sexual dream and well I ended up giving oral, I did that I dreamt of the whole thing, I felt it all too as if it was real.

How is it possible for me to dream one thing but not the other?

Second question is...

Obviously there are these movies where people actually cum when they are having lucid dreams. I've never done that. Is this due to me being a virgin or is there just something wrong with me?