Rigid and plugged.
I"m a heterosexual male into all kinds of urethral play, sounding, cock plugs, and anything to do with pissing... especially watching others piss. Mostly, I prefer it if a woman is involved, but don"t mind watching a guy piss or sound, as long as I get some kinky ideas to try out of it.
I guess I just like anything entering or exiting a cock or pussy.
I think cock piercings are cool, and a PA piercing would be awesome, but probably will never get one done... too messy when you pee; fine for play time, but not so great when you piss on your shoes at work.