My dream would be to have a female partner as you have, and to more or less drink her all weekend! .... And yes, the thought is intimacy and closeness, not domination or a power trip. I have enjoyed this in the past, although my partner was not as into it as yours. It was always a thrill, and to drink from her directly and to feel her sloshing around in my stomach was somehow so bonding. Sort of like smelling your girlfriend's fragrance after you have embraced, but with much more physical presence, and knowledge that it was her choice to partake.