NO way!

Write out your extended pedigree - a list of your 4 grand parents and all of their descendants.

What if, you could only have sexual relations with those people? Nobody else. Only with people descended from all four of your grandparents.

That sexual isolation, would remove you from the general human gene pool, into your own little family gene puddle.

That wouldn't be good for your family, and it is not good for dogs families either.

Does that explain that part of it well enough?