Ricardo,
o1 and o2 are references to different instances of the same class, so when you create o2, the value of o1 has no relevance whatsoever in the instantiation process of o2, what it matters is the class value of the property
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges