That's not very helpful. Sometimes in those dreams I even know that it's a sin but I still do it!

You know what that means? This means if suddenly in reality I went into a room and there was a naked woman lying there then I'd also not be able to resist because if you cannot resist in a dream then you also cannot resist in reality.
crespo, I wouldn't panic too much about your dreams. You seem anxious that because you do something in a dream then you wouldn't be strong enough in waking life to resist. I honestly don't think it's possible to make a blanket statement about all dreams and the dreamer.
I've had some real doozies of dreams where I've done some things I would never dream of (excuse the pun!!!!) doing in real life.
For example, I've had dreams where I've physically hurt my children because I was angry with them.
Never in real life have I done anything of the sort- even when I've felt so angry I could scream.
I've dreamt that I've had an affair and also that I've let a guy talk me into some REALLY inappropriate behaviour even though in the dream I knew I was married.
In real life you couldn't get further from the truth. I've had no trouble whatsoever resisting an advance from someone while my hubby was away and told them in no uncertain terms what I thought of them. The fact that he was very attractive made no difference to the fact that my dream had no bearing at all on reality.
I had a dream when I found a wallet full of money and went and spent it all.
In reality I've actually found- and handed in 3 wallets/ purses and a handbag (one to the police, one to the shop owner where I found it and two directly to the person who lost it) and have only looked inside to find identification.
I'm sure you get my drift.
It's been mentioned that in dreaming you can't turn on lightswitches or look in mirrors. I can and do. A fairly recent dream had me looking in a mirror and counting freckles on my face for some reason (don't have freckles in reality!) And it's nothing to do with lucid dreaming- because I have no ability whatsoever to control my dreams and never have had. My son reckons he can- but I most definitely can't.
Not once have my hands ever looked wavy in a dream. They always look as real and solid as they do in real life. Exactly the same (unless I chop my fingers off- I've done that in dreams before! weird, huh?)
Likewise, I've read you can't dream in colour (ALL my dreams are in colour) or physically feel things (I do- I can tell you how a piece of fabric felt, for example).
I have had vivid dreams that I know have been from God. I have even had dreams about things that have subsequently happened. For example of one of those dreams- years ago I dreamt that my grandmother was going to die and it upset me so much that I made sure that I let her know how much I loved her and what she meant to me - without, of course mentioning the dream.
A month later she died. I firmly believe that the Lord was gently preparing me for the first major bereavement in my life and giving me a chance to say all the things I knew I'd forever regret not saying- and dealing with many of the feelings so that I coped when the reality happened.
I know the difference between dreams that God has sent- and ordinary dreams.
Sometimes dreams really are just that- dreams. Nonsensical stuff that our subconscious throws out there. It's not exactly the same for everyone.
Sometimes it's learning how to cope with something in case life we come across it in life. Sometimes it's because we fear it. Sometimes it's because we
wouldn't do it in reality that our brain plays with the idea in a place that's safe and contained.
Sometimes something quite mundane can appear or trigger it. I dreamt of a humming bird once that had a golden beak. Hubby reminded me that I'd pointed out a humming bird brooch earlier that day as a gift I might buy my Mum!
I'd suggest that if the subject of a dream- or element within that dream is bothering you, then certainly pray about it. It may be something God wants to say, it may be an issue that you need to deal with in yourself- (and don't forget that it may not be literal).
It could just be a dream!
But please don't beat yourself up with the idea that if it 'x' in a dream then it must mean 'y' in reality.
It isn't the case for me- so it just proves that it's different for different people- and not an inescapable given.