Anyone use canola oil (or olive oil) as a lubricant? I read that it's a good lubricant and doesn't kill sperm. Over the years I've become a bit dryer. I used PreSeed last night for the first time but because I read (in quite a few places) that it can be associated with MC, I am scared to continue to use it. I'd rather have that $20+ go to waste than risk it. Opinions? Suggestions?