How best to give head to uncut dick?

I've blown quite a few guys, but feel out of my element with uncut guys. I'm circumsized and have a pretty good idea of what areas to concentrate on, but am really not sure of what feels best to unut dudes. Is it best to kinda leave the foreskin alone, not pull it back at all? Is the head more sensitive, so I need to be very gentle with it?

All advice is appreciated.