Mutuality in love, respect, obligation, responsibility, and, yes, self-containment and self-restraint would seem the underlying themes of this thread. Assertions compromising the goodness of these values — or undermining the value of friendship, however it may develop, and with whom — may lead to where I have no wish to go.
In my opinion, a close relationship between two has its own life and is not about numbers, services, slaves, customs but about shared love, obligation, respect, and, perhaps too, empathy, and with that the ability — or cultivation of it — to see through her eyes, hear through her ears, and to come to experience and understand the world similarly if forever differently too.
That’s all I’m going to say on this.
Even one girlfriend can be two handfuls right away . . . .