The Piercing AU
Grindelwald plays with Percival first - massaging his chest, rubbing his nipples, licking them, working him up until he’s panting and arching off the table for more of Gellert’s touch. He makes warmth spread all through Percival’s chest like he never knew it could.
“Oh, pet,” Gellert croons. “Hasn’t anybody played with your pretty little nipples before? Have they been neglected? Poor thing.”
He massages for long minutes more, and then he places the cold, hard metal against his nipple - so pebbled up and eager.
Percival goes still.