I think most people probably agree with that.
You are not drawing any distinction between different types of behaviour. Until you do, this approach is not going to get anywhere.
If you disagree with me, then I suggest you choose to stop being heterosexual for a week, then come back and let us know how you got on.
You should know better than trying to pass off the result of social influences as the result of biological mechanisms.
If anything, this example simply goes to show the biology that underlies sexual preference cannot easily be indefinitely over-ridden.
Also, do not under-estimate the frequency with which this occurs or the variety of different ways in which it does so - there are plenty of gay mums and dads and open marriages (homo, hetero and bi) out there.
Actually, you weren't very careful about that at all.