When it comes to ones gender dysphoria, I've always advocated truth -- much to the dismay of many cross-dressers. But it was only after my gender dysphoria created havoc on my previous marriage that I took that position. I was then engaged for months with married cross-dressers in a forum [years ago] on the topic, and was all but crucified for suggesting that they be 100% open and honest with their significant others.
