Women are from Venus, and Men are from Mars. Sure, males and females are wired differently, but that doesn't mean men, though usually the more rational sex, are not emotional.
I think the tendency for men to fall in love with a girl based on her looks and for women to fall in love with a guy based on "how he makes her feels" often results in guys "falling in love" before the girl does. A guy can "fall" for a girl almost instantly, but it will take time for a girl to be 'charmed' by a man. If the guy is sexually-frustrated and inexperienced, he is more likely to fall in this trap, as he is not confident around females and, by default, has adopted a scarcity mentality. A more stoic, sexually-experienced man, however, has multiple plates spinning and therefore is way less likely to fall for a girl (i.e. get emotionally-invested) because he knows he has more options. In addition, this type of man can easily differentiate "love" from "lust", and knows these two concepts are very different, though often interrelated. A needy guy will be quick to emotionally-invest because he knows (or believes) that finding a girl after the current one will be difficult. Women, on the other hand, often have a multitude of orbiters to exploit and gain sex, "love", intimacy, or emotional-support from literally at their fingertips (by phone, Facebook, etc.) in order to replace a guy who has just dumped her or gone cold.
I once jokingly took a chick by the hand and told her "I love you" a bunch of times. The next day, I played Mr. Beta-sensitive, told her she "deserved" the best, and that she was "like no girl I've ever met in my life before". These were all lies, of course (she was just some bimbo slvt), but by this point, what have could been turned into a comical, over-the-top display of attraction, turned into a display of neediness. RIGHT after this, she told me that she actually had a crush on another guy, but that guy was "too busy." I was friend zoned instantly. That guy, by showing he was too busy to "need" her, essentially became her alpha.
The key is show a girl you WANT her, not that you NEED her. Giacomo Casanova, the real-life counterpart of Don Juan, said that [this is from Wikipedia]: “a man who makes known his love by words is a fool”. Verbal communication is essential—“without speech, the pleasure of love is diminished by at least two-thirds”—but words of love must be implied, not boldly proclaimed." Using verbal communication and demonstrating attractive 'actions' to seduce a girl will obviously take time and patience, whereas a female can quickly seduce a man not only into lust, but love when it comes to needy males).