It seems like the positive aspects of love are often misattributed to sex: Acceptance, confidence, trust, care and companionship are all attributes of love and are not intrinsic to sex.
-Person falls in "love" ---> the relationship leads to feelings of companionship and trust because they've connected on a deeper level, sharing thoughts and feelings that leave themselves vulnerable ---> they have sex and, having opened up to one another in their most vulnerable state, this further strengthens their trust, commitment, acceptance of one another. At this point they're pretty damn confident in their relationship and social obstacles outside of their relationship are more easily dealt with. They know that they're worthwhile and don't need constant affirmation from strangers.
-Other person has sex---> experience pleasure, maybe a feeling of accomplishment (depending on level of sexual experience), some acceptance ("at least I'm not so repulsive that I cannae get teh sex") ---> the sex buddies bid each other farewell and neither has any more confidence in their social skills or ability to maintain a relationship than they did before. Other than being "accepted" for mutual masturbation, based on a very loose set of guidelines, their self images are relatively unchanged.
Just because loving worthwhile people often involves sex does not mean that involving sex would imply worthwhile people loving. There are plenty of less-than-admirable people procreating
of course, this is based on nothing... I just don't want to get the alzheimers
