Was it your first time? If it was he might be nervous about it. Or he's worried or stressed or tired...
There's a bunch of reasons why he might not be able to get hard and most of them a really no reason to worry about. I'd say just be patient and don't pressure him. This is probably bothering him loads more than you.
There's a bunch of reasons why he might not be able to get hard and most of them a really no reason to worry about. I'd say just be patient and don't pressure him. This is probably bothering him loads more than you.