Not necessarily. Ex: Chen of Exo.
I'm just saying from asian culture and fame is like that. Most of the time for a man to be flirting with women as a celebrity is kinda not cool. But skinship with fellow members or the same sex is considered non threatening for some reason. Most idols are either pan, gay or lesbian very few probably identify privately with heterosexual preference. I think alot of it has to do with the fan bases. If they like someone publicly theytear them up, and I think to me it's no ones business who they sleep with. But you know for those of us who do know you would be kinda shocked to the degree I'm LGBT idols in the industry. And the numbers are higher then people who chose to identify as heterosexual.ヾ(❀╹◡╹)ﾉ~
But then again I'll let you know a little secret, most idols aren't able to meet with women so I you can put two and two together. Some goes for the female idols. (●'◡'●)ﾉ