Why is my body not physically sensitive?

I have been noticing that my body isn't physically sensitive. I have friends who are very sensitive. They are very ticklish, feel more pain, bruise easily, etc. Those are the same people who's genital regions are also very sensitive (as I've heard about those very friends easily having multiple s). In my case however, I have a very high tolerance for physical pain. I am not ticklish what so ever. I still enjoy but can't experience every sensation. I have to use my fingers during to get an . What is wrong with me?