This right here is a very important subject.
There are some couples who practice this i.e. they expect their partners to unfriend, block or disassociate themselves with all their friends (friends they've had prior to the commencement of their relationship).
There is something quite disturbing about this but for some reason, there is always a way for them to justify their action/request to their partners.
What is your take on this issue and is there any suitable justification for this?