Sirius never really forming an emotional bond with anyone because he never really had anyone growing up. Sirius never really feeling attracted to anyone and not knowing why. Sirius going to Hogwarts and third year coming around and Hogsmeade trips and everyone is dating but he just doesn’t want to. Sirius sitting in the Three Broomsticks and hearing Peter and James going on about how gorgeous Madam Rosmerta is. Sirius ot really understanding what was so special about her. Sirius going home and hearing his mum talking about his Uncle Alphard who was a freak because he wasn’t the least bit interested in sex. Sirius talking to his Uncle about it the next time he came over for Sunday brunch and asking his about it. Alphard assuring Sirius that there was nothing wrong with him because he wasn’t interested in sex. Sirius falling in love with Remus in their fifth year. Sirius and Remus dating in fifth year. Sirius seeing Remus walking out of the showers one day in nothing but a towel and Sirius thinking thoughts for the first time. Sirius realizing he would very much like to shag the gorgeous werewolf. Sirius writing to his Uncle explaining that he was cured of whatever was wrong with him. Alphard writing back saying he wasn’t cured of anything, and explaining that he was only sexually attracted to people he loved and cared about. Sirius going to Remus and telling him all of this and Remus smiling and then grinning and then dragging Sirius back up to the dormitories.