How to make it tighter?

So ladies I have a little problem. My husband said my vagina isn't tight enough for his pleasure (and he isn't too big in the width department - more like a carrot as opposed to a banana when it comes to widness). He gets his relief if we do anal and I don't enjoy that position at all. Is there something I can do to make my hole tighter (and I don't even understand that as I have no kids and haven't been with anyone outside of him). Please help!