Getting confusion between love and self interest. If one loves someone because it gives pleasure, one should not be regarded as loving that person at all. The love is, in reality, though this is not perceived, directed towards the pleasure.
Pleasure and joy is the an object stimulates our brain which reacts in the form of feelings and leads to submission.
The source of the pleasure is the secondary object of attention, and it is perceived only because the perception of the pleasure is not well enough developed for the real feeling to be identified and described.
Even though for sake of an argument if we disagree with the perception above. It raises an unanswerable answer apart from having an opinion. Some may not agree and may have difference of opinion. Have your say which may lead us all to have better understanding perhaps.