If you see someone eyeing your womb you're probably going to be weirded out by how friendly they're acting. You only let people who are really, really close to you look at your womb. So if this guy is acting that friendly he should have introduced himself first.
This friendly guy comes up to you and start to introduce himself, "ぼく-" but you stop him. He's been getting way too friendly with your womb and you don't want to hear who he is. He can ぼく at someone else, you're out.
Currently there are no similar looking kanji which exist in the WaniKani learning system