The idea that he wanted another time sobered him for a moment. He wasn't much good at relationships and he liked to blame his parents for that. The excuse was better than blaming himself, after all.
"Mate, once you've had a taste of Sirius Black, you're ruined for every other person out there," Sirius said as he forced a laugh. "Seriously, though, curiosity satisfied and all that, you'll go back to birds and we're mates. Easy as that though if you ever do decide to experiment..."