It is true, you cannot tell at all. I love how much fun it is to tease people about my gender
The trick is to establish that doubt in people about if they think you are male or female, then after that never reveal it. Just let people think what they want ^_- Like on here I have never established my gender yet.
I assume everyone on the internet is a man unless otherwise noted :D Good rule of thumb I think :o
Also, the real trick, is to wear men's clothes and still have people think you're a woman. Having a man compliment you on your tie, because he thinks you're a ****** woman wearing a tie, is kind of cool.
Having another man tell you that you need to stop wearing your current shoes, and get a pair of heels, also funny.
Helping deliver a baby (if that's what you call what I did) and having the family buy you a gift, which was a woman's blouse, also good. I still have the blouse too, memorabilia ftw~
I just made it a contest and won hurray :D