L.O.
L. it probally does have to do with your 15 yr old brother. Like they say monkey see monkey do. My daughter is in first grade and last year and this year she talks the same way about boys being hot. She even holds hands with them on the carpet for story time. I think if you raise him right and talk to him about what is appropiate then he will get it. I talk to my daughter and i keep planting the words of god in her head and thats about all you can do. Puppy love i have a older daughter also and she really thinks its funny and alot of the things that come out of my younger daughters mouth came out of her older sisters mouth also. Just keep on doing what your doing and i m sure he will be fine.