If you clicked on this story because you've never used lube before, let us just say, first of all, that you're missing out. Secondly, that could be one (of many) reasons you're not getting her off. Lubricants make sex more comfortable. They let you and your partner get into positions you might not otherwise be able to settle into, can increase your arousal, and amp your odds of simultaneously climaxing (still a stretch, but it's definitely more doable).
Whether you're new to lubes or looking for something to help you to finally nail shower sex, or make your sex dry spell less, um, dry, take things in to your own hands. These lubes will make sex better, hotter, and more electrifying.