The level of "force" necessary varies, but I think it can be said at least that without the "forced" requirement, most of them wouldn't have gone that far at the least as an opening move.
A few are already willing and its just an excuse, others aren't forced but wouldn't have the balls to do it without being forced, and others are actually and fully being forced against their will. One of which is a major character and a huge part of the story is building towards her shame about that "embarrassment" making decisions for her.
I'm not sure how much the anime has changed (need to catch up), but I think the scales are heavily tipped on "wouldn't do it otherwise" level of force.
The level of "force" necessary varies, but I think it can be said at least that without the "forced" requirement, most of them wouldn't have gone that far at the least as an opening move.
A few are already willing and its just an excuse, others aren't forced but wouldn't have the balls to do it without being forced, and others are actually and fully being forced against their will. One of which is a major character and a huge part of the story is building towards her shame about that "embarrassment" making decisions for her.
I'm not sure how much the anime has changed (need to catch up), but I think the scales are heavily tipped on "wouldn't do it otherwise" level of force.