We usually only use lube with toys or for anal. For vaginal sex, I pretty much have that one covered in the lube department. I've always been extremely juicy to begin with. I guess it's my personal bodily make up. Dunno. I'm not a fan of lube for oral on him and he's never really used lube for oral on me. He's told me that he's not a fan of flavors or scents that alter my natural one. And that is good enough for me.
This needs a sometimes option. If I don't need it, I don't use it. If I can't produce enough lubrication on my own or use it all up during a session, out comes the lube.