I don't think the Boy Scouts ask if you are homosexual, they say no if you are an obvious "proud" homosexual, if it is how you choose to identify yourself.
I would not want a Man who identifies himself as a heterosexual, as someone who loves women and seeks to have a sexual relationship with them regardless of age (NAMGLA anyone?) in charge of a Girl Scout Troop either.
The BSA never asks what your sexual orientation is. In fact, a Scout who was fired from a Staff position at Camp Yagoog (one of the best camps in the U.S.) for being homosexual was actually reinstated by the BSA after he appealed to National Council and it came out that his sexuality had only been confirmed because the Camp Director directly confronted him and asked him what his orientation is. The Scout, obeying "A Scout is Trustworthy", told the truth. Unlike some areas of the U.S. military, "Don't ask, don't tell" is enforced from both ends in the BSA.
And if I had a heterosexual leader who talked about his activities in front of the Scouts, he or she would find themselves out of our unit as well.