Remus had indeed opened his mouth to offer James a glass, but closed it as soon as James took his drink. Evidently, his friend was in a hurry.
Which wasn't as surprising as the question that followed. Eyebrows hiking an inch up his forehead, Remus had to take a breath before saying anything.
"Wow." The word was out of his mouth before he could really think about it, and he took a slow blink as he thought it through, still recovering from the sudden plunge into his private life. "I- Maybe. I don't know. I've never been with a man, I've only ever had one date and it was with a girl, in my twenties. I don't know how to answer your question. But I think... Sirius has been something of a constant."