Recently, our daughter (17 in June) told my wife and me that she has started dating not 1, but 2 guys. No introductions needed since we already know them; they’ve been close friends of hers for quite some time now. Daughter put it as: why do I have to choose if I like them both and they don’t mind sharing?
I just don’t like it.
Increased exposure to STDs,
increased risk of emotional abuse (most grown adults fail with poly relations),
increased risk of physical abuse, especially with young men being hot headed and often hierarchy minded
increased risk of sexual abuse, “you are already dating two guys, why dont you want a threesome/gangbang, dont act like this” risk of pregnancy with denial by both potential fathers, or dispute about who takes the father role
increased risk to develop commitment issues (those are already prevalent enough in our times)
None of these have to manifest, but it is perfectly reasonable for a parent to have an instant gut feeling against this.
My question was about OP’s feelings specifically. I could compile a list for or against myself, that wasn’t what I was asking for.