Kate, I understand your concern and appreciate you're radar (intuition), which is usually a caution predictor. I've a neighbor similar, a widower who likes to put his hands on women and make inappropriate comments towards them when he is unwelcome. Thus, I've learned not to 'invite' him, for instance when he is nearby I act as if I don't see him and become occupied, walk the other way when approaches on street, or any other public area. You see, his wife's death was ruled 'accidental' and for some unknown reason to me, he was not awarded the insurance policy of which he had increased a few weeks before the 'accident.'

Kate, it simply may also be innocent, yet I do understand the nuissance. Do you have a dog?