Volunteering can make you feel as good in addition to benefiting those you are helping.
With parasitism, only one of the organisms involved is benefiting from the relationship.
Recently a more convenient way of benefiting from bee venom therapy has become available, which does n't require you being stung or injected !
She is also the head of a charitable program called Together Strong, benefiting youth.
Under the terms of a "spendthrift clause," those people benefiting from a trust do not receive gifts, as such.