Depends on the class, and on the subject matter. I didn't say I ask after every lecture, mind you. But many, if not most, yes, sure.
I am lucky to be going to a school where the faculty not only loves their research, but they love teaching, as well. Often, faculty will mention something as a side note that's related to their work that is interesting to me, or that I'm a bit unclear on. In those cases, I find it's best to ask for clarification from someone who not only researches it for a living, but also communicates their research as part of their job.
Sometimes, I'll ask a question about the way in which some disparate concepts are interrelated (obviously, if the class notes are explicit about such a relationship, there's no question to ask).
Still other times, as a former teacher I am interested in pedagogical approach, or maybe the degree to which an analogy fits a particular concept (not only for my understanding, but for my ability to explain it to others).
Point is, it is possible to have many questions to ask on a regular basis without being either A) OCD or B) a kiss-ass. Besides, in my experience, it's fairly easy to see through the latter, anyway, and being seen as a kiss-ass is of no use to me.
In any event, your mock question reveals quite a bit about why you might think it weird to ask questions: I tend not to find lectures to be boluses of uninteresting minutiae.