It’s not as simple as XX vs. XY. Sometimes things develop differently than you would expect from looking just at someone’s chromosomes, including in ambiguous ways that aren’t very obviously “male” or “female” at birth. Biological sex exists along a spectrum, not a simple binary. These are two quick examples of differences of sex development that don’t fit into the typical “male” or “female” buckets, but please note that this video barely scratches the surface of the nuance around this topic...