When I was about 6 or so, I was friends with a brother and sister who lived on the other end of the block. As kids do, eventually we wound up exposing ourselves to one another. I was fascinated by the sister, totally blah to the brother.
I liked girls from as early as I could remember - I still remember Amy from kindergarten - nothing was better that getting paired up with her when on a field trip and the teacher told us we had to hold hands.
I was swiping my father’s Playboys and smacking the babysitter on the butt from a very early age.
Story told before.
SWAT was on TV when I was in 6th and 7th grade. Us girls were all supposed to be swooning over TJ, the sniper, because he was blonde and blue-eyed and was always getting in trouble over wearing his cap backwards (he’d flip it because it bothered him with the scope and forget to flip it back). If you didn’t like him, then you were supposed to like Luca, the Italoamerican womanizer.
One day my classmates were talking about how gorgeous TJ was and I said he didn’t do anything for me - I just don’t like blonde and I’m not particularly crazy about blue eyes either. I didn’t like Robert Redford or Paul Newman either. The class leader said “oh, so you like Luca!” “No, I want to slap him. Hard. And I don’t find him particularly handsome, either.” They all stared at me thoughtfully, and finally Class Leader said “you are weird”.
Now, OK, I did know I was weird. I’d been hearing I was weird my whole life. But, and this is a concept I’d only acquired two years before in Sex Ed class (thank you, Mrs. Imaz) - was I a lesbian? Did I find girls attractive? No, I didn’t.
I didn’t like TJ, neither his hair, nor his watered-down eyes (sorry. My apologies to the actor), and I didn’t see his “cap troubles” as a sign of rebellion but of not being very bright.
I wanted to bitchslap Luca. Womanizers, no thanks.
But Jim Street? The serious, dark-eyed, dark-haired guy who was attending college part-time and wanted to study law? Played by Robert Urich? Honey, they only thing to be disliked about that one is that Urich is now dead… so, I figured I was definitely not a lesbian - but I was pickier than my classmates and less likely to define my tastes by what teen mags said I had to like 
I started out just assuming I was straight, because it was the default. When I started masturbating (age 13) my fantasies were about men. I started thinking about my sexuality around my sophomore or junior year of high school. I realized that the way in which I had really liked my middle school band teacher had actually been a crush, and that I’d had proto-sexual feelings for one or two other women as well. I was clearly more straight than bi, but there was a little bit of bisexuality there. I did wonder now and then if I was just trying to be different, but as I got older, I started liking women more and occasionally fantasizing about them. I had sex with women a couple times in college and enjoyed it, but I knew that I really, really liked penises and wanted a partner who had one, so I only dated men.
In early grade school, Jennifer of the Jungle from Electric Company held a strange fascination for me, I watched that show exclusively waiting for her to show up.
Shortly later, Col Wilma Deering in low-buttoned uniform made me feel real funny in a good way. Buck Rogers in low-buttoned uniform squicked me out.
Playing doctor with the little boy down the street at 5 yrs old… Hot Hot HOT.
Watching two girls (who tried to get me to participate in a doctor-like game), at 5 yrs. old felt wrong and weird and icky.
I have fantasized about sex with unknown women before, and enjoy a little girl on girl porn action. But I have never been attacted to any woman I have ever met. And I was never interested enough to experiment in college… (I was too freaked out about soccer, and feeling fat, and my coach telling me if I only lost a little more weight I would be so good) BLAH.
Now I am married to a great man so I think I missed that boat. But to this day, as “so and so” says in Teen Girl Squad, “I have a crush on every boy.” And I do. My current crush/mastabatory fodder is Eric from True Blood. Mmmm! Eric.