Hahah. Sorry to learn your own sister was required to inform you of their in love sex lifestyle ?? If you ask me, (I lived-in Japan 36 months) they aren’t humping truly. hahah
Because the you’ve told you in this post, you should think about the man as his personal people and never an entire battle of people…he could be still one! However with eg huge social differences, just while in a love but through the entire ‘relationships game’ this is exactly high information!