Sex has the potential to become an alternative currency when the sexual more allow bartering between those who desire sexual attention, even the mere company of a harlot who receives favors in return.
The Invisible Hand of Prices according to Adam Smith, will immediately adjuct the value of such trades.
When we see that 80% of all the Nation's wealth ends up in the control of women, while things like the present $1 Trillion Dollar Welfare budget illustrate how Food stamps, free contraceptives, Federal paid Abortions, Housing, Special Education stipends, etc are really collective contributions of the society to the women who qualify it become apparent that this is a currency second the visible economy.
It is a second currency within a sub-economic environment where the transaction as hardly different fro Black Market Enterprises.