I never notice when i cut myself shaving

I almost always cut myself when shaving, but I never notice until after I've done it, when I see the small amount of blood trickling down my face. I don't notice any sudden sharp pain as I cut myself. The reason I'm asking if this is normal is because whenever someone cuts themselves shaving in the movies, they always wince and let out a small gasp. I always figured that was just overdramatising it, but I thought I'd ask here anyway.