Guidance related for sexual health. Not?

Hi, I am 24 years old boy having some questions related to my penis. The foreskin of my penis is attached to the glans ( tip of the penis) and I am able to slide the foreskin back n forth with no problem. When I have an erection, I am not able to slide the foreskin back (below the glans) as it feels like the connection between the foreskin and the glans will break if I do so. My questions are - 1. Is it normal to have the foreskin connected to the glans or I should get it removed? 2. With an erection, it is normal for the foreskin not sliding below the glans (penis head)? Because since my foreskin is connected to the glans, I am not able to do so. 3. Also, while washing the penis (when foreskin is completely retracted backwards), my penis head (glans) are sensitive to touch, so I am not able to touch them, but with little practice, I am above to touch the skin below the glans. It it normal to have such a sensitive penis head? Or not?