1. arousal DMG comes from sex attack, details: data/Effects/Skill/BasicSexService_<part>.json
2. no sure though, maybe for something like attack distance, since it comes from the function take_damage, which is a method used for all kind of attacks. details: data/Scripts/Frames/Modules/BattleSystem.rb, and the original calling function comes from player_sex_mode_control function in data/Scripts/Editables/150_Game_Character_BattleSexSystem.rb
3. 2 ways: use debug skill, key in this code in console(F10) to learn: $game_player.actor.learn_skill(63)
, or find all of them in Data/NPCdata