I feel that to an extent this is a "generational" issue.
Talk to the "younger" generation and the issue of being gay (or bisexual) is just not an issue to that age group and, in my opinion, rightly so! The younger generation are far more accepting of a person's sexuality - this may be because of more awareness and education or the advent of equal rights legislation etc.
When I entered the airline industry in 1970 a flight engineer told me over a beer that nobody cared what you were like so long as you could do your job properly - I think he was correct!
An earlier comment assumes that all gay men are promiscous. This is not the case and it is timely to comment that some straight people are promicous also.
Perhaps we also need to be reminded of the fact that (in the UK) it is now illegal for an employer to discriminate in respect of a person's sexual orientation.