Kare wa dōseiai-sha kamo shirenaiga, kare wa daijamaru ni tasshita toki daijamaru no yō ni, kare wa chīsana kodomo ga sukina koto ga dekiru kare wa mata, kanōsei ga
This has been asked a lot, and I honestly find it to be rather irrelevant, so instead let me ask you y it is that u r asking? R u interested in him or something? I mean the guy has shown no sexual preference from either way so my guess would be that he is asexual or just doesn't have time for sexual feelings, but he is a drawing if you want to admire him "that way" feel free to do so. U_U
Well, we've seen Kishi make characters be attracted to other characters, while Sasuke has shown no type of attraction to anyone. That's where we get asexual from.
NB would choose getting a precise answer for Sasuke's sexuality over what's the cure for cancer, I swear.