Dear Queenie,
My sister often gives away things she has received as gifts.
Queenie, isn’t this rude after someone has gone to the trouble and the expense of giving you something?—Gifting Etty Ket
Dear Etty Ket,
Not necessarily.
Look at it this way: Not only has the recipient had the pleasure of receiving the gift, but also the pleasure of giving a gift to someone, especially if the recipient otherwise could not have afforded to do so.