Yeah, I love to teach, explain, decontruct, rebuild, debate, etc. In fact, it's one of the few ways I'll begin to seriously relate to you. Extra bonus if you can teach me about something I'm interested in. In university, I used to be quite popular among my circle of peers come lab and exam time since I would always sit down and explain a concept that was immediately present in a paper. A lot of people try to hoard info, but I also take a more democratic approach by disseminating it. I like to think it's because it empowers others, but maybe it's just an excuse to brag.
SLI/ISTp -- Te subtype
i tend to fall into the teacher role more often than not, not necessarily because i like teaching but because i like deconstructing concepts and making them easier to understand and i need an audience to check how well i'm doing.
also i just like helping others, sue me.
edit: i'm not a delta st, i just wanted to add to abbie's post.