Does having sex with someone who has a genital piercing feel better than without?

Piercings: I think that would be different for each person. I don't think you can make any generalities about this.

Not necessarily: If you pierce through your glans penis it may interrupt flow of urine. If you are not circumscribed it can prevent the foreskin from falling back into place once retracted. Penile rings can cause erections that do not resolve and require emergency medical care. An infection from your piercing can travel through out the rest of your body & may sometimes be lethal.