According to the theory of Evolution, it is very obvious that the proportion of number of sperm are wholly shitty high than the number of ovum existing, this makes ovum to choose between lot of sperms ( here female has lot of possiblity to choose which one to mate), so it rightful decision of any female to have sex with any of the sperm containing Human, that is Man!....this makes the anticipated generation geneticially variable and its worth a good move towards achieving a new adaptable offspring that really endorses the theory of evolution to be true. Here in the case of galfriend having sex with a some X guy is not wrong because there is an existence of a healthy environment of two opposite sex having sex to give this Human civilization an entirely new offspring with possibly good genetic makeup. The world runs in this way........... So, score dont think that ur galfriend having sex with other guy is not wrong, becuase at the same time u r also involved in a healthy environment of having sex with hot chicks out there wherever u r ( tito satya timile accpet garnai parcha)............don't u admit that u also have sex with chicks being in relationship with ur gal friend at the same time??...think about that dude!!...............remember everyone needs SEX......"sex is very important than life itself"