Phase I

The only reason why I know about Gilbert & George is because I've seen various looming posters pasted around the art department, reminding me that I need to get my butt in gear and submit some work to the De Young by March 4th.
In the fall of '07, I did a teeny search on them to see what they were up to, and somehow must've gotten distracted, because all that I can remember is that they used some unconventional materials, and maybe some type of performance art? But, are they a team? Father and son? Lovers? Brothers?