I understand where you're at on this. The first time I encountered the idea that Clinton abused her with his power & position I was very much "hey, she was an adult. A young one, but an adult."  
Then I saw it again a few weeks ago, and I've been thinking about it. 
If I were 50 and had a 22 year old intern, would it be an abuse of my position and authority if I coerced her into oral? 
Yeah. Yeah, I think it would be.  
I would probably call for his resignation (If I were as I am now but back then).  But then I'd probably relent after a heartfelt on-camera apology.  That part is hard to say.