2). Added to garlic-heavy dishes flat leaf (Italian) parsley is said to reduce garlic breath.
3). Swallowtail Butterflies are attracted to it. Parsley makes a great food for swallowtail caterpillars like the one below. I haven't seen many swallowtails in the garden and only a few caterpillars so I was very happy to find this one this morning, munching away.