Only really in a familial sense, I've wondered whether anyone else in my family wasn't straight, since there're all sorts of theories about it skipping generations or being hereditary or whatever.
But I find teenagers that make tons and tons of 'gay' jokes very odd. I do wonder if that's a defence mechanism.
Personally I felt no sexual attraction or showed any attention to either sex until I was about 15, so I wouldn't say so in my own case, but

it's one of those things. (FYI I played with both 'male' (power rangers, hot wheels, action man, robot wars) and with my sister's LOL, but that was more out of trying to get variety than anything, I find kids try to recreate stories and families and movies through their toys so they're going to need females at some point