To Milliontoone & Chamillion:
Before I started packing, I also questioned the point. It's not real, it's plastic, why should I bother? I decided to give it a shot and found that I liked it. I have no doubt that the fact that I pack with an STP improves my outlook towards packing: it is at least functional, and I like having the option of standing at a urinal instead of having to sit all of the time. Even though some bio-guys sit, it is just nice having the ability to choose. Also, I like knowing that I can easily take a leak outside if hiking/camping.
Outside of practicality, I find that just the look of *something* there... feels more right. Seeing myself in mens' underwear with a baggy, unfilled front is just a harsh reminder. And logically, I know that what does fill it isn't *really* mine; I didn't grow it, it's not attached. But the mind is indeed a powerful thing, and as much as I have been able to disconnect it from certain parts of my anatomy that I can't accept, I have been able to connect it to an inanimate object in a way that just makes me feel better somehow. I try not to dwell on the fact that, for now, a plastic penis is as good as it's gonna get for me.