gay siblings

[marshlander]

As far as research has proven thus far, homosexuality (indeed, all sexuality) is effectively random, so though it's statistically less likely to have multiple gay siblings than heterosexual (judging by the accepted statistics on the number of LGBTQ people/population) there's no known genetic or biological reason why not.

Put simply, it's possible. =)

Not sure if you had subscribed to the site when I posted this link to the first of six YouTubes featuring John Barrowman's investigation into the latest scientific thinking on this subject. I do recommend them if you have the slightest curiosity about what's being discussed at the moment.