i've adapted to climax faster than my forefathers. as a species, i think we've come to cum faster so that we can have time for other things instead of being obsessed with sex. think about how good it feels. wouldn't you want that feeling to last way longer? well it won't 'cause we adapted. my theory is that back in the day our species recognized its need to repopulate and grow, but now our species recognizes that we have reached or are close to maxing out our population, and are now overpopulating the planet. so we cum quicker.