Learning about nubs. Is this one?

[katlou1]

Find it all so interesting but I'm not very good at seeing the clues. Is the centre of the red circle the nub? Or is there not even on in this pic?
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[sweetdream]

No clear nub. You circled the spine.
You got to look higher for a nub. Its were the boy/girl parts develop.

[katlou1]

Thank you. That's kind of what I thought and no nub showing, boo. Thanks