Well, at the very least, I think you might be sp/sx instead of sx/sp. @Pano Lou

I am going to go ahead and give you the benefit of the doubt on the duality thing that @silke pointed out, since it may just be that you’re figuring out the system and may have mistaken your and/or others’ types. We all do that. As I mentioned before, you may want to approach this differently this time, instead of the erotic style approach.