After re-reading our exchange, I realize that we're at odds, not on what we are saying, but on the underlying assumptions. And I suspect we're far closer on them than might be thought at first gasp.
As I was using it, one's sexuality is not equivalent to one's sex life, or one's sexual orientation, but the romantic-sexual component of what makes you up as an individual. You are a heterosexual, not because of your desires or what you may or may not do in bed with your husband, but because you are a person in a committed marital relationship who loves your husband in a marital way. The entire complexus of what makes your marriage work is a part of your sexuality by this definition.
And it's that point, which seems to escape a large proportion of the anti-gay poster contingent, that is crux to what we're saying. (Meaning both of us, I think.) You are not in point of fact flaunting what you do in bed by your username -- and I honestly did not mean that. The point that I was trying to make, and which provoked you to take offense (for which I am sorry), is that your (hetero-)sexuality is key to the whole relationship with your husband, not just the sex act aspects of it. You love him as a man, as the man to whom you're committed, in a different way than you love your children, your friends, your birth family, God, mankind, your home, etc.
And this is true for the committed gay person as well -- it's not just the sex-driven aspects but the whole interpersonal relationship that define their (homo-)sexulaity, and the love, desire, loyalty, commitment, etc., are closely analogous to your own.
And from what you've had to say, I suspect we in fact agree on that -- that the misunderstanding lay in my failing to define what I meant by 'sexuality'. Am I correct?