I thought Kimmy had sex before w/the British guy
This AV Club article made Kimmy's sexual episode with Dong seem like a bigger deal than it was. The author alleges Kimmy only was able to have sex with Dong because of the handcuffs on him. I think she's making a bit of a stretch.
I also thought Kimmy had sex with the British guy even though it was awkward.
http://www.avclub.com/tvclub/unbreakable-kimmy-schmidts-night-romance-takes-dar-235820