The tango of a milonguero is perhaps the only thing that he really owns. His dance is his and his alone. No one can control it or take it away. He can be generous or selfish with it. He can use it to conquer, to seduce, to give and receive pleasure, to earn respect, notoriety, money.
As Gavito used to say, "Tango is my mistress. Only she has my heart."
No one tells a milonguero who to dance with. He might comply once, as a gentleman, but that person will be invisible to him forever more.
Do you think I can tell Ruben who to dance with and when? Or who not to dance with?
Ruben, like all milongueros, owns his own tango.