penis question please tmi warning

I've been with my Husband and my Husband only. He was not circumcised. I've noticed in movies when guys masturbate they have lotion and tissues. Excuse my ignorance but what's that for? Serious question because when i do that for my Husband i don't need lotion for my hand? And he has a super sensitive Dick, you have to be careful when pulling down his foreskin and touching it. Are exposed Dicks without foreskin like super super sensitive?