It is wrong to be with multiple partners.
John is on a dating website when he receives date requests from five women.
John doesn't want to hurt anyone.
John chooses one of the women to date, and he sets the other women up with his attractive single friends.
John dates all of the women at the same time.
John gains friends and a wonderful new girlfriend.
John is discovered by the women, and his reputation on the dating site is tarnished.