Using your feet to crulse with each other may feel awkward, but do it till it feels natural, be patient learning.
It may feel awkward to begin crulsing using your own feet, but be patient and practice until it feels natural. Use your feet to work against each other, using different forms of exploration such as massage, stretching, or resistance.
Choose the form of exploration that works best for you and use your feet to perform it. With time and practice, using your feet to crulse with each other can be a highly effective and satisfying technique.