In recent time, there seems to be rising cases of abominable sexual relationship among people too related by blood.

Such sexual relationship (most times involving rape) are mostly seen among a father figure and a daughter.

More recently too, the social media has been awashed with arguments on why DNA is necessary once a child is born.

I'm in my thought now and it crossed my mind: what if these cases --most-- are a result of these men not being the biological fathers to these girls??

Sorry the topic appears more like a complete research than a question. But has anyone thought of this??

Such abominable cases are mostly not always because of the dad not being the biological parent.
The dad could be the biological parent but pure lust, seduction, curse from past relationship or even hereditary challenge are the main causes of recent incest in families today.

Stacyomolola:
Such abominable cases are mostly not always because of the dad not being the biological parent.
The dad could be the biological parent but pure lust, seduction, curse from past relationship or even hereditary challenge are the main causes of recent incest in families today.

Those are very plausible causes...
But is it possible that we're neglecting or not thinking towards another plausible cause such as the question raised in this thread??