Girls out there, here's your answer to all the mysteries of man! 
1. Why he love Oral Sex?
Men don't just love oral because it feels good but in fact, they love it because it makes them feel accepted. It is a huge turn-on for them when their companion goes down on them. Men are visual creatures, so position where they can see you.
2. Why he gets tongue-tied saying "I love you"
When he gets choke on his words, it doesn't mean that he doesn't love you. Men have difficulty making the right brain talk to the left brain so that they can access emotion and language simultaneously. That's why for a lot of men, it is difficult for them to verbalize their their love in a manner that does not feel forced or phony. However, they show their affection through other means, when he cook for you or gives you a massage.
3. Why doesn't he just listen?
If you call a friend and say, "I'm having a crappy day," she'll put everything on hold and ask, "Are you okay?" Your partner, on the other hand, hears your complaints and tries to explain why it isn't so bad.
There is a difference between how men and women process stress.
Women will instinctively talk in order to feel better, while men are more likely to focus on the problem and try to fix the problem. Which explains why a listening ear does not come automatically to men.
4. Why he keeps checking out other women
If a man have wandering eyes, it doesn't mean that he does not love his partner, but it is his biology at work.
Men's brain are wired to look at female shapes and is why erotic images appeal to them so much. In addition, the poor guys lacks of the peripheral vision, thus tends to turn their heads to look.
Now you have your answer solved, it is just their biology pattern to have weird habits. *perspective of a girl! :)
