So this is second part of sex system update.
I will repeat here explonations from early access post.
I want to make sex looks like minigame, so now you have resources to balance, goal to achieve, and tasks to complete during the sex scene.
The main goal is to fill up heart bar(pleasure bar) and to not loose your stamina(area 4 on image). When you climax with filled pleasure bar you will get 100 heart points with according lewd escence. The pleasure bar will be filling up if only requirenment (area 1) is fulfiled. On Area 2 we can see that Abigail asks us to use "missionary" position, in area 1 we also see "missionary" requirement for position and "fast" for speed. But we using "at wall" position at "fast" speed so only one requirement is fulfiled and pleasure is not rasing up while stamina ends realy fast(it depends on the speed). Area 3 is your lust, it's not using now but will be important in Sex system update part 3 because will grant you sexual knowledge(kind of exp for skill tree). Area 6 is consumable that will help you to balance the resources(there are 3 new events which will introduce you this items).
Area 5 is poses, and as you can see it now divided in 3 groups. "Servise" - using this pose you get some rest(recover stamina) but girl will loose her pleasure, "Lewdness" - is common poses with "basic" pleasure gain and stamina loss. "Pervetion" - increased pleasure gain and stamina loss. Also each girl now have this stats(you can check it in sex diary) and using corresponding pose will increase corrisponding skill(for example "missionary" pose will increase "Lewdness" skill). "Servise" skill will increase your stamina gain during this poses. "Lewdness" increasing pleasure gain. "Pervetion" reduse pleasure loss in different conditions(for example during "servise" poses on max "pervention" will not any pleasure losses) and will affect on your lust in future.
All stats will be balanced additionaly and changed in next updates.
also added 3 events with 3 new items which you can consume during this sex scenes.
also all hot coffe scenes from dating update now use this sex system.