on the one hand, most people aren't going to notice. on the other hand - and i'm sure you'll agree - if somebody decides to really analyze, they are going to notice.
it reduces this concept of "passing" to something that is entirely dependent on circumstance, at least until the post-op point. the reality is that very little effort is required to "pass" in at least 90% of circumstances. it's not something most transgendered people really have to worry about that much. then, some effort is required to pass in about 9% of circumstances, and that will vary as the criteria becomes more stringent. and that other 1% - which is dependent on people paying extra close attention - is just impossible, for anybody that's pre-op. unless you want to put a roll of quarters in there or something.
"actually, it's a banana."
when you realize this, i mean really realize this, it ought to take the weight off, though, rather than act as a constant point of discomfort.