Ah, not just me anymore. So, once again, I got a completely random and off-topic video in my recommendation: a 14-year-old girl who got herself pregnant, but it "made her smile," and when she told mom (who she's really close to) it "made her smile as well because she'll have her first grandchild," la-dee-dah . . . and practically every single comment on the video is the same: "WHY IS THIS IN MY RECOMMENDED?!"
But in browsing through the comments, I think I may have picked on something that would explain all of this: someone offered up the theory that YouTube actually has a option or feature to partner channels that allows you to pay them to place your videos in people's recommended, whether they're relevant to what they've been watching or not. If that's the case, that could very well explain why I occasionally get recommended videos of that other pre-teen girl who has millions of subscribers and her videos have millions of views; or how last month, I somehow got sexually suggestive videos in my recommended after watching only videos of bunnies and windmills.