Gonadal hormones like testosterone and estrogen play a major role in activating and maintaining libido (sexual desire) in both men and women. The influence of these hormones changes with age, and central (brain) factors become more important over time.
[M4F] Is there anything better than a milf? Obviously not! A selection of 4 milfs (we can decide how I know them) and you can play one or all in a plot we think of together. Calling all milfs! I've got other ideas too!