I don't follow Ken Starr's life, but my memory of him is that he is a bit prudish.
I wasn't aware that he was a "perv". Just one of the great and the good, probably not very imaginative.
I am not going to hate him merely because he is defending this president and ran the impeachment of another one. What will be alarming is if he is inconsistent. But that will be picked up on and will weaken Trump's defence.