infection

In one of your youtube videos, you've recommended almond oil as a vaginal lubricant. I've heard from various sources, including my local feminist sex store, that "oil and vaginas don't mix". I'm not 100% sure why, but i think it has something to do with promoting bacterial infections. I'd prefer to use oil based lubes, because who the hell knows what they make those water or silicon lubes out of, but i also don't want to put my partners at higher risk for infections. Are you sure it's safe?