why do guys want to have sex with a lot of girls

guys are always seen as assholes who would do anything to get into a girls pants and as many pants as possible .. but why is that .. why is this massive urge that guys have to have sex ..

for any specie to survive they have to have offsprings .. for them to have offsprings they need to have sex .. it takes 9 months after the egg is fertilised for the baby to come in the world .. so the female is booked for 9 months once she's pregnant .. the guy on the other hand is still available to mate .. now assuming evolution works and it dictates that the best genes are passed on to the next generation the most efficient way of doing this is to get 1 out of say 10 males' genes to pass on with 10 female genes .. so 10 guys fight it out, 1 of them (the strongest gene) wins and then he gets to "spread his seed" to get to the next generation .. the males are hardwired deep down inside to win the race and have sex with as many girls as he possibly can .. this is how we survived in the past and it will take a lot of time to get over this hardwiring (the monogamy is a very recent phenomenon).

hope this helps some girls see a reason to forgive their boyfriends when they catch him sleeping with some other girl .. its not his fault .. its evolution !