in reply to Why I learn a language.
Then after things pretty much fell apart and my lawsuit against them was still in appeals, I had even stronger motivation to learn. They still had control over me for a while longer, so they hired (or purchased? I was never sure) a model TXE330 Doberman-class Personal Security Agent to "keep me out of trouble". In practice, that meant two straight months of huddling terrified in a corner of my cell. The judge sure would have taken a very dim view of this, had he survived!
Anyway, it turns out that sadistic old Doby was programmed in Perl, and I learned a lot by reverse-engineering the code that was briefly visible whenever he bent over to take a leak. I eventually found a bug in his control program (it should have been /\bbreathing\b/, not /breathing/) and managed to write out a simple exploit on his battery refill one morning. He had only chewed off one of my arms at this point, so it was relatively easy.
I still have flashbacks whenever I use Perl, but I've found it to be enormously valuable ever since my early years. Personally, I think everyone should learn Perl, if only for self-defense.