You already unlocked the threshold, it just wasn't ordering properly, fixed. The other scene should not be reachable without wearing a plug, which I fixed.
any version after the 3rd digit (ie: 0.8.5.x) is bugfixes and/or art, never a major release.
Fixed, you triggered "strict" unisex the morning after strict chastity (which takes the place of the kissing her feet option/scene) and it overwrote the following morning's event.
Not entirely certain what you're asking, but it is possible for the player character to have penis + vagina, and there are a couple similarly-equipped female NPCs (as well as female NPCs with just a lady lance). In 0.8.7 there will be an option to replace all male NPCs with women, but that's several months from release (0.8.7 will enter backer testing pre-release in August, public release in Sept).