Movies/Shows with strangely intimate characters and/or have no boundaries?

I'm looking for some movies and TV Shows where it seems like the characters have no boundaries *and/*or are strangely close with one another.

In terms of no boundaries; meaning the characters are willing to do anything without shame.

And strangely intimate; as in characters relationships' are not realistic as they are borderline romantic with someone who wouldn't be their partner.

Note:

I'm having trouble wording this, what I'm looking for is to be confused by the audacity of people in the film/shows and to be weirded out by how the relationship dynamics are due to either a lack of establishment or because its unrealistic/odd. anyway, thxx in advance