I'm a lesbian.
I realized this when I was eleven.
I've been overweight since I was eight.
I think it doesn't have anything to do with my sexuality-- just the fact that I have an addictive personality and became addicted to food because it was comforting to me.
My mother's an alcoholic.
I don't have a dad. I thought that my step-dad was my biological father until I was twelve.
I'm sixteen now, and I don't live with my mother anymore.
And I'm in the range for obesity.
Eh.
Depression and traumatic experiences are reasonable causes for weight gain, but I don't think sexuality has much to do with it.
I guess you could look at it from the point of view that... homosexuals have to deal with feeling as though they're different, being teased and taunted and isolated when they come out, and not knowing how to deal with it except to eat... but I don't know.
It just depends on the person and how they react to things and deal with life.
I'm a pretty screwed up person in general, I suppose.