I never bothered using anything while I was pg with my 3 and got loads of them, but have now had a tummy tuck and had most of them cut out. I have a few left and have been using bio oil. It is sooo great, and for an oil, it just absorbs really quickly and has a nice refreshing smell to it. It has really improved the appearance of them.
The cocoa butter is just too heavy and I agree, it does stink.