Why is my boyfriend SO AGAINST me getting breast implants?

It's not about how big you're going, it's the fact that you're making your breasts fake. Women don't understand, men prefer natural breasts. You don't need breast implants, it's such a ridiculous thing for a self respecting woman to do. Personally I'd leave a girl if she done it, so ridiculous... it's sad women feel the need to do this to themselves, so sad :/