You can jerk off however you like, using fingers, hands, or sex toys. The first step is to get into a sort of foreplay with yourself, gently stroking different parts of your body. When you’re aroused, get into action by lubricating your vagina/clit/penis. Use your hands/fingers to rub on the area consistently till you come. If a sex toy is involved, turn on your machine and place it in the right spot. Keep touching yourself until you’re too overcome with sensations to continue.