I identify as a biologist also and trust me; if anyone ever deceives me I'll be surprised because all you need to do is look at height, feet, hand size, adams apple, a potential "bulge" in the pants and mainly their voice. Their gay accent is tough for most trannies to master. IF they somehow had deceived me before I was married to my biological female wife, there would have been three sounds; his scream, my KO chin shot and his body hitting the floor.