Originally Posted by
Arctic Cyclist
He was prepubescent. Prepubescents are normally asexual. Unless they are being sexually abused. However, given that Tallant was possibly aro-ace, Damian might be as well. Although it could be that a post apocalyptic world is a terrible mating scene.
We do know that there are multiple versions of adult Damian shown in romantic relationships with women, as well as another alternate self in Ibn who is happily married and hetero-monogamous.
There isn't much evidence he's ace outside 666, or gay at all.