man can fall in love for several reasons
1) Because of Infatuation
2) Loneliness
3) Need for Frenship
4) Hormones always bothering him - for lust,weaknesses - beauty/charm/cheerful smile, voice,nice body etc..
6) because of ego, prestige, high expectations in life
7) For a relationship - to want to have family (NORMAL LOVE)
8) because parents got him married - arranged marriage
9) live with a dog for 6 months, and u fall in love with it too
10) To share weakneeses/strengths, moral support, pain and pleasure to be able to trust, honor, respect, depend on someone ...THE NORMAL LOVE OF A HUMAN BEING. ..TO be a normal human being.