My Latest Discovery About Myself

I'm not a pervert girl, but the other day I realized that I like to watch the shower scenes in movies of drama. :P Since then, I've wondered why. One night, I was pouring hot water over my unclean head in a bathroom and then, I found out the reason. It was not because I can watch naked actors, but I just like the resonant sound of hot water splashing the wall or floor. It feels the hot water washes away my fatigue, stress or dirt from my body. Listening to this sound while pouring hot water over my head is more refreshing than washing my body. 
 
Hello! you write very well because there weren't so many mistakes.... I liked your story about hot water.. (: sayounara!

This is well written! Here are a few things I might change:

My Latest Discovery About Myself

I'm not a pervert, but the other day I realized that I like to watch shower scenes in movies or dramas. :P Since I wondered why, that night I kept pouring hot water over my head without washing in the bathroom. Then, I realized why. It is not because I can watch actors naked. I just like the sound of water splashing onto the wall or floor. It feels like as if the hot water washes away my fatigue, stress, and dirt from my body. For me, listening to this sound while pouring hot water over my head [this is redundant] is more refreshing than actually washing my body.

I also like the sound of splashing water.  It is very relaxing!

My Latest Discovery About Myself

I'm not a perverted girl, but the other day I realized that I like to watch the shower scenes in movies or dramas. :P To understand why, that night I kept pouring hot water over my head without washing in the bathroom. Then, I found out the reason. It was not because I can watch naked actors, but rather that I just like the resonant sound of hot water splashing on the wall or floor. It feels as if hot water washes away my fatigue, stress or dirt away from my body. Listening to this sound while pouring hot water over my head is more refreshing than actually washing my body for me.

As the other guy said, your English is very good! But I believe this is a very natural way to talk in the UK ^^ hope it helps!