Graves has never had a partner who cared if Graves enjoyed sex. When he did come, it was always either just his body's natural reaction or an accident.
Grindelwald is sorting through his captive's thoughts and memories so that he can impersonate him, and comes across all the painful memories about Graves past relationships and feels absolutely terrible for Graves, because even though Grindelwald is a psycho, he's never been so selfish as to not give as good as he gets in bed. And he really wants to see what Graves's looks like when he's enjoying sex.
So, either during Graves's captivity or afterwards, Grindelwald works extremely hard on seducing Graves, going nice and slowly because the poor Director deserves having someone take the time to lower Graves's walls. Then, when Graves gives in, Grindelwald very tenderly makes love to the auror, making sure Graves enjoys every second of it.
Graves/Grindelwald- Takers Can Be Givers, Too, past noncon,, angst, h/c
Grindelwald is sorting through his captive's thoughts and memories so that he can impersonate him, and comes across all the painful memories about Graves past relationships and feels absolutely terrible for Graves, because even though Grindelwald is a psycho, he's never been so selfish as to not give as good as he gets in bed. And he really wants to see what Graves's looks like when he's enjoying sex.
So, either during Graves's captivity or afterwards, Grindelwald works extremely hard on seducing Graves, going nice and slowly because the poor Director deserves having someone take the time to lower Graves's walls. Then, when Graves gives in, Grindelwald very tenderly makes love to the auror, making sure Graves enjoys every second of it.