taiyuu_otoko
Master Don Juan
Faking everything requires a super human amount of brainpower that nobody has.Why?
You are misinterpreting their fickle emotions for conscious fakery.
In fact, they are not faking anything, it's that there emotional "state" has a half life of about 0.23 seconds.
So when they say they love you, and they a quarter second later they pick up a knife and say they want to kill you, they are being truthful both times.