Her whole stick was hard for people to get on the first seasons so it comes out as unfunny/nonsensical.

She's a masochist character who has a deep sense of duty but it's actually inexperienced with anything related to sex or masochism because she mostly always tried to kept some kind of appearance especially in front of people like Iris.
This led her fetish to be really closeted and unhinged begging for release, but she's actually coward when it comes to then.

See? If a joke has to be explained it loses a lot of power.