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oh I never noticed hahah xD I guess it's because my favorite ones at the moment are females, now that I think about it I don't know if they rlly are or I just asumed Σ(っ°Д °;)っ
If there's a ball sucking scene there's a high chance that the story is written by a man.... Since well.... That's actually an important part of irl gay sex.... We really like playing with the balls ┑( ̄Д  ̄)┍
the author is male?? wah that's rare in BL the story was soooo good and sweet!!!