A few months ago, I stopped telling myself it was just stress. I finally asked her straight out what was going on. What she told me wrecked me a little. It wasn't me, and it wasn't that she'd lost interest. The way we'd always done it was uncomfortable for her, sometimes even painful, and she almost never finished. So somewhere along the way, without either of us really noticing, she'd just started saying no instead of saying something.
For weeks I didn't know what to do with that. Then I mentioned it to a buddy of mine over beers, half-joking, half-desperate. He didn't laugh. He told me he'd been through something similar with his wife, and the thing that actually changed it for them was some kind of positioning pillow. I brushed it off at first. Felt a little ridiculous. But two weeks later, still stuck, I looked it up.