Merge two curves into new one like rhino

Hi guys Im trying really hard to find the best way to model an egg chair, and I came across a tutorial from rhino:

That given 2 curves it does the wizardry of bounding them together.

Does blender have a similar modifier, curve option that can perform the same?

Thanks for the help

P.S. if you like i made the same post on blender.stackexchange: Merge two curves into new one like rhino