The most basic natural need for women, as for men, is the reason for male - female attraction: sex. (datingadvice.com)
There's nothing bad in satisfying natural needs and if you feel that you don't need anything meaningful now you still shouldn't refuse sexual life. (adult69personals.com)
Keep stress to a minimum by recognizing an animals natural need for rest, exercise, and mental stimulation. (second-opinion-doc.com)