From the side some people think they resemble a pipe.
I wasn't terribly concerned about the flowers, or the scent of the vine. I wanted it because it's a host plant for butterflies. These beautiful Polydamas Swallowtail Butterflies lay eggs on Pipevine.
If you look closely you might find the round yellow butterfly eggs. I usually know the Polydamas Swallowtail Butterflies have laid them after I notice chewed leaves though; they're easier to spot.
Some people call them Pipevine pests, and they will chew up the vine, but I think the butterflies they turn into make them well worth having in my garden.
When the fabulous pipe-like flowers are finished, they make these wild looking seed pods that resemble hanging baskets.
Pipevine, or Dutchman's Pipe, has attractive flowers and heart shaped leaves. It doesn't smell wonderful, at least mine doesn't, but it's a host plant for Polydamas Swallowtail Butterflies so I enjoy having it in my yard.