I genuinely hope you are a man catching these secret meetings in the men's room. The men's room is sacred, and I've found it typically very quiet, except for the occasional biological sounds. It isn't a social place, and the last time I've said anything in a men's room, it's typically been "that faucet's not working" or "occupied." Locker rooms are a bit different, but toilet facilities? Come on. It's not like we have couches in there.
I think what's really happening is conversations get started, like in a hallway. Anything longer than a couple minutes, I swear, if I was in a stall, I'd probably shout "hey, guys, take it outside, please. I'm workin' here." If I ever catch someone on their cell phone having a casual conversation (unless they are trying desperately to have a difficult conversation in private), I will ritually consider making flatulent, throat-clearing, or expectorating noises to communicate their location. At a minimum, I'll give them a puzzled, offended look.
I don't know where you are where a transsexual appearing female is actually attractive. It has been my observation that transsexuals are emotionally troubled, and I'll back that up with the APA's DSM II materials. The APA took it out of DSM III+ only on the protest of the gay rights crowd, not because they were the least bit wrong on the subject. The transsexual was probably overlooked for reasons other than appearing gender.
I'm not without my compassion, but to undergo intense surgery just because you're convinced you should have been born "a man" or "a woman" is not accepting who you are. And, you know what? That translates to poor self-image. I really, genuinely feel for people who are struggling like that. But, denying that there isn't a poor self-image, some level of emotional pain or suffering, that's not compassionate, that's being selectively observant. How you address the issue is another matter entirely. I remember there was some article on Slashdot about being able to locate "closet" homosexuals on social media sites by feeding in data such as who their friends are, to determine probability that they are homosexual. One thing that homosexuals have on heterosexuals is that, on the whole, they have love and compassion figured out, because they need it more, and have built a tight community around it. That did not require a research grant to figure out.
So, on topic, here's my theory: women dislike IT/computer science because it is thankless, grueling, demeaning, and without the right "titan" spirit, emotionally damaging. I'll put forward the argument that emotional balance is harder for a woman because of their hormone dynamics, and they wear thin more easily in this field, and either back out of it completely, become a heartless person (there's an example above with totem poles) and deny their nature, or they work very hard to find an excellent life balance and actually thrive.