But now the story.
Although most dragons are male some are female (they have to - I do NOT have to tell you about bees and flowers and where the little dragons come from ... have I?).
With your eyes you could not see the difference between the sexes. The differences are mainly within the body. Spare me the details - you do not want to hear about a vagina sized like a barn’s door, do you?
But there is one characteristic one can always tell the dragon’s sex by: If the dragon asks for a virgin it is a male. If the dragon asks for a sexually inexperienced boy - it is a female (or a gay male but dragons prefer not to talk about that). To know that is important.