NURBS Socking
We need to take these 2 parts and bring them together seamlessly, like an arm to a shoulder.

Rebuild surface tool the sphere to 8x8 UV.

Keep on right click marquee
selecting isoparms and then detach surface
until you can delete the one in the middle:

Rebuild surface for the cylinder ... 8 on U:

Select isoparms and Detach surface where the arm could meet up to the hole in the sphere at each of the 4 corners:

Shift select both these surfaces at the top and Attach surface:
Hit Rebuild surface:![]()
Repeat this Attach and Rebuild surface process in the 3 other sides:

Detach
here: 
Attach
here and Rebuild:
![]()
Detach all around so we have this:

Work your way around the sphere detaching, attaching, and rebuilding sphere surface to sphere surface.
Remember to always detach back to the original surface area after each operation.
until
you have this all the way around: 
Finally, apply global stitch ...

slowly increase the value if necessary to close gaps:
