Gamers with Jobs has an excellent look at the pacing of games, and their resemblance to sexual response cycles
. From the article: "The female sexual response cycle appears as a gradual (sometimes maddeningly so) upward slope from excitement to orgasm, with several 'false peaks' in the plateau region. Anyone who's ever performed cunnilingus while kneeling on a hardwood floor can attest to the validity of this representation. The male cycle differs radically. The transition from excitement to plateau in men is rather rapid, represented by a near-vertical line. The plateau stage is then almost horizontal for varying amounts of time (see: premature ejaculation) followed by another extremely rapid ascent into orgasm. Playing video games often reminds me of the above."