Still don't understand...

maybe i don't understand your question, but the point seems to me to be to create a connection between two different objects. im' sure they give a bit of the answer to help newcomers with syntax until they get further advanced.

please refer you class Man and Women which was created . Woman woman =new Woman(); creates object of woman where your code all the variable created amd also Man husband; here we use our woman object to store man variable in husband . like that woman.husband=man;