I see what you are saying, but sometimes alcohol isn't just something that affects rational choices and taints decisions but can be something that loosens inhibitions and makes certain desires or things we would have been scared of doing possible i.e. Dutch Courage
How many times has someone really fancied someone/wanted to end a relationship/been too scared to stand up to someone until they have had a drink or two? (Also there is the failsafe "I was drunk you cannot hold me accountable for my actions because I was under the influence of alcohol" excuse that is handy in the morning if you feel regret for the actions of the previous night. I would argue that perhaps in a lot of these situations alcohol or other substances act as a catalyst or facilitator to behaviour that people otherwise would have been too scared or shy to try in a sober state.
I would also argue that a game of truth or dare is a similar if not even better facilitator. Maybe some of my straight friends were curious and or wanted to try snogging a guy but never would in a normal situation. All of a sudden in a game where they are "forced" to, it's ok because then they are not judged for their actions and are only doing it for the sake of the game and not for their own pleasure or desire. (Besides any good game of truth or dare has a penalty option for anyone who doens't want to go through with their particular dare or question :biggrin1
I don't think this contradicts anything I said before. I still think that straight guys can be genuinely curious or want to try things with a guy. Just sometimes alcohol can help to make people care less about social contstucts and learned behaviour. Besides none of this would even be an issue if we didn't place such strict labels on sexuality...