Such Friendships are of course very liable to dissolution if the parties do not continue alike: I mean, that the others cease to have any Friendship for them when they are no longer pleasurable or useful. Now it is the nature of utility not to be permanent but constantly varying: so, of course, when the motive which made them friends is vanished, the Friendship likewise dissolves; since it existed only relatively to those circumstances.
Friendship of this kind is thought to exist principally among the old (because men at that time of life pursue not what is pleasurable but what is profitable); and in such, of men in their prime and of the young, as are given to the pursuit of profit. They that are such have no intimate intercourse with one another; for sometimes they are not even pleasurable to one another; nor, in fact, do they desire such intercourse unless their friends are profitable to them, because they are pleasurable only in so far as they have hopes of advantage. With these Friendships is commonly ranked that of hospitality.
But the Friendship of the young is thought to be based on the motive of pleasure: because they live at the beck and call of passion and generally pursue what is pleasurable to themselves and the object of the present moment: and as their age changes so likewise do their pleasures.
This is the reason why they form and dissolve Friendships rapidly: since the Friendship changes with the pleasurable object and such pleasure changes quickly.
1156b The young are also much given up to Love; this passion being, in great measure, a matter of impulse and based on pleasure: for which cause they conceive Friendships and quickly drop them, changing often in the same day: but these wish for society and intimate intercourse with their friends, since they thus attain the object of their Friendship.
That then is perfect Friendship which subsists between those who are good and whose similarity consists in their goodness: for these men wish one another's good in similar
