I've got to agree with everyone else - her rules must be stopping HER from having a good sex life too. I'd start trying to push the boundaries a bit if I were you.
But, from someone who's also a bit of a 'thin-lipper', here's what I like instead... butterfly kisses on the temples and whispers in the ears, lifting of hair and kisses on the back of the neck, running of tip of nose from top of arm to fingertip, kissing the underside of breasts, very tip of tougue (so not too sloppy) around lips. Course if none of this does anything for you, you might not gain anything, but always worth a shot.
If she doesn't like the sweat, what about keepig some clothes on?