No, you shouldn't have to apologize but I also don't think anyone is asking you to. A lot of men believe that all women want the biggest man they can find because that's what they've learned from porn, when in fact, it's a relatively small percentage who would want that on a regular basis, as per your own quote. Which is I'm pretty sure what most stories on the topic have said.

If that's something you really like, then keep on enjoying it.