And to answer the original question, I have no flippin' clue why men are hornier but I think it's a combination of chemical makeup/social conditioning.
Like I said, testosterone. Sex hormone. Men have it in spades.
Although, randomly, I swear I read some study where a handful of women agreed to be injected with some testosterone - not enough to make them grow facial hair or anything - and they did see a pronounced increase in drive.
And, also randomly - mid-cycle, women usually experience a spike in sexual desire, and it's because our testosterone levels (though puny compared to men's
) heighten slightly. I only found this out because I was watching some tv show with an obgyn on it and some ladies were like, "Is there any way to increase a women's sex drive?" and the obgyn's first question was, "Are you on birth control?" and the women were like "yes" and so the obgyn's response was that birth control usually suppresses that spike in the cycle because it's artificially enginnering an altered cycle to fool the body into thinking it's already pregnant so the hormone fluxuations (fluctuations?) just don't happen.
I agree though, social conditioning is also a big component of it. Apparently it's virile to want sex all the time. It's manly and attractive. So if men have a crazy sex drive, awesome! He's a manly man!
But women do have comparable struggles. Not because of similar hormone levels, but because of social stigma. An insane amount of women feel like they're "dirty" or "wrong" for having any sort of sex drive at all, so when they experience the temptation to explore the sexual arena - alone or with another person, with pornography, etc. - they are so ashamed that they try to bury it and they lie, lie, lie because they're convinced it's just not a womanly thing to do.
Versus men, who are confronted with the social stigma that it's "normal" and even "expected" that they look at and enjoy porn.
All this says to me is that human sexuality is in a very, very broken state. It is so far fallen from where it could be. Where it ought to be. There are so many temptations that distort sexuality's good purpose... so many things that lead us astray into dark territory. And it's a fight for ANYONE to overcome these things. It's not "easier" for either sex - there is an equal amount of pain, of shame, of tears, of denial, etc. It hurts just as much regardless of whether you are male or female.
Unless you have a relativistic moral code where anything is permissible and everything is good. But since we're Christians here, we acknowledge the fact that things like these damage our relationship with God and they impair our ability to be who we truly want to be.