As much as I appreciate guys acknowledging the "world peace" potential of gals like Miss Biel or the aforementioned, please consider:
A lot of guys wage war exactly because of sex. Kill the original owner a particular woman or rip out his testicles, kill the children and heirs, make the woman fertile once more. Burn the neighbours capital, come home with loot to attract some ass. Or, come home with slaves who will satisfy your every need.
Probably only a smaller number of young men actually fight for purely competitive purposes or because they sadistically enjoy inflicting pain.
But it certainly is true: If every guy is to wake up with a blowjob, we can expect the world to be a lot more peaceful.