I think these discussions tend to get lost in the weeds.  Like "it was ten years years ago" or "it was locker room talk" or  "it is the Christian thing to forgive".  

Regardless of whether he did what he was claiming or not, he thought what he was describing was cool.  So cool he was bragging about it.  His behavior and words during the campaign have included plenty of examples to indicate these attitudes have not changed.  It is revealing of a perspective on the use (abuse) of power, highly relevant to what he would be like as president.  

He has not asked for forgiveness.