Heterosexuals don't talk about their sexuality with each other cos why should they?
Heterosexuals talk about it all the time. Straight dudes talk about their gfs or hot women and straight women about their bfs or hot men. They talk about it on tv a lot. In movies, shows, games, books, magazines, even the damn news about Putin finding a new gf (VOMIT), or Berlusconi's women (VOMIT x2) or Merkel's "adventures" (VOMIT x3) and every politician/actor/singer's personal life.
And they brag about it, and not the "Look what i got" way, but the subtle way which (ironically) a lot of heterosexuals get annoyed when gay people do it instead. Hoo boy, god forbid if they do it.
But the majority doesn't realize it because it's the "norm". Example by what i just quoted from you. Classic case.
So please, spare me with the "heterosexuals don't talk about it" nonsense. 