I see beyond the fabric

Do you look that very serious boss in the office, and wonder what it wld be like when he is naked? Or wonder what he looks like while he is having sex? Well I do it. I did it to my lecturers (back in school), I did it to the ever serious kids in my class, I did it to my VC. I did it to every serious person, I even do it to the president of Nigeria. So when ever am in my naughty mood, and someone comes up to me, or anyone around me, and becomes so serious and all, I just imagine it. If they are all controlling or something while they have sex, and yell, FASTER!!! Or turn.... or anything. Sometimes, I even try, but some people's result come in very ugly that I have to cease that thought and try to think of Christmas. Sometimes I wonder if this is just me, or does it also happen to some other people.