Is there such thing as a "selfish need"? Often in different contexts sexual desires are referred to as "selfish needs". The word "selfish" implies a desire that is excessive and self-indulgent or opposed to the interest of others but the word "need" implies a desire which is natural and important and therefor not excessive.

Good point. But the word "need" is also used in the sense of "strong craving". And strong cravings can be selfish both in regard to what is craved and in regard to how the craving originated. For example, someone starts going to expensive designer shops and comes to need the attention and flattery of the sales people there. Similarly, gamblers may need the next thrill, drug addicts the next fix, and so on. In such cases the word "need" does not imply a desire that is natural and important.

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