This is a good summary example of something I find distinctly dangerous about the way people think of figures they don't personally know (i.e. how people on the social web treat public figures, or even just any stranger they see on the web). We see snapshots and assemble a person in our head. We can barely do that with any degree of fidelity regarding people we personally know, much less public figures.
People do good and evil things. But a person, in virtually all cases, is not "good" or "evil". Even if Feynman was engaging in the two behaviors you are thinking of at the same time (whatever those behaviors are - I'm not commenting), it still doesn't make him some kind of paradox. It does so much damage to think like this. This false dichotomy is especially prevalent for sexual topics, because they trigger stronger emotions and push us towards our "that guy good, that guy bad" instincts.
People do good and evil things. But a person, in virtually all cases, is not "good" or "evil". Even if Feynman was engaging in the two behaviors you are thinking of at the same time (whatever those behaviors are - I'm not commenting), it still doesn't make him some kind of paradox. It does so much damage to think like this. This false dichotomy is especially prevalent for sexual topics, because they trigger stronger emotions and push us towards our "that guy good, that guy bad" instincts.