No, I am specifically talking about biological variation in sex characteristics. This is common, and it's not surprising if someone is within the range of "the opposite sex" for one or several sex characteristics.
There are men under 5'4", women taller than 5'9", women with high testosterone, men with low testosterone, men with breast tissue, etc.
There are men under 5'4", women taller than 5'9", women with high testosterone, men with low testosterone, men with breast tissue, etc.