Jakob writes:

Ok so Im 16 and so is my best friend Lola. We've been super special awesome best friends since we were like 11. We're only friends though, its never gotten romantic. In fact, we're like brother and sister.

We go to each others houses alot and we go out to places. Not dating, just as friends.
So another thing is that we're pretty comfortable around each other sexually. I mean I can have my shirt off around her, no problem. (Which I have, a few times) And she can be with me in just a bra, no problem. (she has been a couple times) Hell, we can even change together, after we go swimming or something. We dont look or anything but its not like we have to cover our eyes.
So earlier today we had a situtation like that. We were almost totally changed (we were both topless, and she didnt have a bra on)
When she started panting and sat down, she was starting to feel really sick. That was why we left the pool, her feeling bad but it was getting worse. She asked me too feel her heartbeat, see how strong it was. Now that was very awkward, for obvious reasons. But she was my best friend so I did what she asked and put my hand on her left breast. It was weird, and yet nice at the same time, to be touching her there. I told her that her heartbeat felt fine, and I started to take my hand away, but then she took my hand, and placed it back on her chest. Then she took my other hand and laid it around her right breast. She said that she liked it when I touched her there, it made her heartbeat speed up. So I just kept my hands there for a little bit. It was so crazy! And yet cool at the same time! We actually sat there, for 10 minutes talking about a bunch of stuff, and I was rubbing her breasts for that entire time!
So as I was getting up to leave she stood up too and asked me to hug her. This was before I had a chance to pick up my shirt, so when wrapped our arms around each other, her breasts pressed up against me. She asked me how I felt, and I said the truth: That I felt a little warm inside. I mean, Lola and I have hugged hundreds of times, but we'd always been fully clothed. (Except for when we're swimming, and both in swimsuits.)

We're best friends, so why did she suddenly make such forward, flirtacious advances on me if we're like brother and sister?
Help please.
Also, please tell me what I should do in any situation you propose?

MR. GOODADVICE RESPONDS:

You must be kidding right? Friends have sexual relations all of the time. It can change friendships and sometimes end them, but I find that its often worth it. It seems to me you are not interested in breasts because I've never quite heard of a reaction quite like yours. I say perhaps there are deeper issues here with regard to your sexuality. Maybe you should be topless with one of your guy friends. Then maybe you would understand sexual attraction.