I am watching my nephew Dennis for two weeks while his parents are away in Bermuda. Today, I brought him to a local water park, The Hydration Station. As with most water parks I'm sure, there were several girls scantily dressed. While this isn't attractive to me, I noticed my nephew's eyes wandering. I cannot get a hold of my sister Kathy, his mother, but I think someone should give him the sex talk. I love my nephew and I want him to be safe. Is it in my place to give it to him, even though I'm not his father? Or is sixteen too young for a boy to get this talk? I'm conflicted, because I have another week and a half of watching him and I just feel so anxious about it. I'd appreciate some feedback.