Reduced Decline in sexuality with age
The sexual activity of laboratory animals on an extreme CR regimen actually decreases a bit in their younger years. This is consistent with the theories of why CR would have evolved in the first place: Resources get shifted away from reproduction and growth, toward repair and maintenance. But animals on CR, sexuality does not decrease with age at the same rate as it does in their control group. In fact, this was first noted over fifty years ago in studies by Maurice B, Visscher at University of Minnesota.

From "maximum lifespan"
"there are astonishing studies showing that laboratory animals on CR not only still have sex and otherwise display sexual interest at an age beyond that of animals in the Non-CR group that have died, but they can actually become pregnant and give birth to healthy babies when ALL of the control animals are DEAD! Also CR actually increases follicular reserves--meaning, in human terms, that menopause could be postponed by many years.


Improved Mental functioning with CR
This is a lab finding that is perhaps most important to keep in mind if you're worried about CR simply prolonging old age. It most certainly does not-- it prolongs and restores youth in many ways. That a mouse which in human years would be over one hundred years old can zip through a maze with the problem solving skills of a young adult rodent may seem incredible, but this phenomenon has been documented repeatedly in research studies. CR prevents the brain cell death that normally occurs with age.

References

[1] A. Hiona, C. Leeuwendurgh, "the effects of age and calorie restriction on Brain Neuronal cell death/survival," Annals of new york academy of sciences. (June 2004_ 1019: 96-105

[2] A. M Holehan and B. J. Merry, "Modification of ageing and development (october 14, 1985) 32 (1): 63-76

[3]C. J. Carr, J.T. King, and M.B Visscher, "the effects of dietary caloric restriction on maturity and senescence, with particular reference to fertility and longevity, " the american journal of physiology (1947) 15:511-519.

[4] Roy L. Walford Maximum lifespan. (new york: Norton, 1983): 90.