But first, some fast lube facts:
Though lubrication can be made from water, oil, petroleum, or silicone, water-based lube is usually your best bet: It's safe to use with condoms, and it's easily washed away (you're at greater risk of getting an infection with silicone-based lube because it isn't water-soluble, so it's more difficult to wash it any lingering bacteria away). If you're prone to yeast infections, use a water-based product made without glycerin (sugars found in glycerin feed yeast, causing it to multiply). And now the fun stuff:
1. Use it when you masturbate. Yes, even sex with yourself can be improved with lube. If you have dry hands, no need to use a moisturizing lotion that could contain unwanted chemicals, especially inside you. Just apply a few drops to your finger before touching yourself for a smoother feel.
2. Use it when you masturbate with a vibrator. Imagine the electrifying pulse of your favorite vibrator hitting all the right spots. Now imagine using that same toy to gently glide over your clitoris with the same power, but a totally different, more fluid sensation. A dab of lube on a vibrator is a total game-changer. Just be careful: If your sex toy is made of silicone, you'll definitely want to use a water-based lube, since silicone lubes can deteriorate soft rubber.
3. Use it during vaginal intercourse, obvi. There's no wrong way to use lube during intercourse. You can apply it directly to your body, or to the penis or condom itself. My personal rule of thumb is to start with a dime-size dollop and work up from there. Sure, you may encounter a point at which it's too much (he's slipping everywhere, it's dripping excessively on the sheets), but that's easily remedied with a paper towel. You don't want to reduce all the friction, but that threshold is personal for everyone and you'll know it when you feel it.