For now he or she is straight.
Most do not know if they are gay till the come out at 18yrs old. But secretly come out sooner. So I say, for now straight untill they decided if that’s the path they chose. Gives them time to think and find out who they really are. Never judge someone by the way they think or act. Might cause problems.
Unless they know who they are before hand. Like. I’m gay and I known it since birth. Something to that twist. Never judge a person. Just love them.