i could name several without much thought. eliminating the traditional moral constraints around marriage, relationships, and childbirth, for example, would be very beneficial to those (and i'm not necessarily saying this is you) who want to be highly promiscuous, get pregnant, and abort any resulting offspring so they don't get "tied down". for those in traditional marriages, breaking down those constraints would make it easy for you to get bored of your relationship, feel trapped, feel it's fine to step out of your marriage, have affairs, get divorced, and leave your children in the lurch.