Is it normal that my sister has these feelings?

I have two questions dealing with my little sis...

My little sister is a Freshman in highschool and she would rather come to me instead of my mom on certain things and ask if it was ok or if she needed my opinion etc. Here are the two things that have concerned me.

1. This one isn't to bad. She has always wanted a brother who was a year or two older than here. She is a huge tomboy and when I asked her why she wanted a older brother she said ''I want someone who I can wrestle around with and mess with but would also stick up for me.'' When I asked her why not a sister that would do those things she said it would be weird. is it normal for her to want a older bro?

2. This one I had alittle trouble getting out of her but she finally told me. She came home one day and said she needed to talk to me. When I asked her what was wrong she said that ever since she has been in highschool she has noticed some cute seniors, or atleast that is how she put it. She told me she would like to make out or kiss a couple of the seniors but not go any further. I just find that weird and unusual but I didn't know if it was or not and I really didn't know how to respond to her telling me that.

Should I be concerned or IIN?