It ' s because when you look in the mirror you see a 3 D image rather than a 2 D picture . The depth perception given by the 3 D image lets you see yourself with more definition . <| sep |> I never thought about the 2 nd party experience angle , but that definitely makes sense . I was thinking that just watching an older brother or sister navigating dating is more useful than anything a parent might say since they are out of touch with the nuances of modern dating . I was also thinking more being able to see that the opposite sex are just people who poop and lie just like everyone else . Having another sibling of the opposite sex helps with not putting someone on a pedestal . <| sep |> What in the fuck ? Listen , potty mouth . It was a unique situation . Decent house in an upscale neighbourhood . Owner wanted to move immediately , house didn ' t sell immediately , owner didn ' t want the mess of bridging for an indeterminie period of time . Rentor wanted a stable house for a long period of time , with an eye to purchasing in the future . 5 year mortgate put on the house , 5 year lease was agreed so the rentor got a stable arrangement and the landlord got to defer decision of selling for the duration of the mortgage . Neither rentor nor landlord knew what the heck they were doing or what was standard , but that seemed reasonable at the time .