Yes, it is possible to masturbate without using lotion. There are a few ways to do this:
1) Use your own saliva. This is the most natural way to lubricate your genitals and it's also free! Just make sure your hands are clean before you start.
2) Use a vegetable oil or coconut oil. These can be found in most kitchens and they make excellent lubricants. Again, just make sure your hands are clean before you start.
3) Use Crisco or another type of shortening. This may sound strange but trust us, it works! Just apply a small amount to your genitals and get ready for a slippery ride. Plus, it's easy to find and usually inexpensive.