Hey, whatever works:

While the CIA has a long history of buying information with cash, the growing Taliban insurgency has prompted the use of novel incentives and creative bargaining to gain support in some of the country’s roughest neighborhoods, according to officials directly involved in such operations.
In their efforts to win over notoriously fickle warlords and chieftains, the officials say, the agency’s operatives have used a variety of personal services. These include pocketknives and tools, medicine or surgeries for ailing family members, toys and school equipment, tooth extractions, travel visas, and, occasionally, pharmaceutical enhancements for aging patriarchs with slumping libidos, the officials said.
“Whatever it takes to make friends and influence people — whether it’s building a school or handing out Viagra,” said one longtime agency operative and veteran of several Afghanistan tours.

For example:

The Afghan chieftain looked older than his 60-odd years, and his bearded face bore the creases of a man burdened with duties as tribal patriarch and husband to four younger women. His visitor, a CIA officer, saw an opportunity, and reached into his bag for a small gift.
Four blue pills. Viagra.
“Take one of these. You’ll love it,” the officer said. Compliments of Uncle Sam.
The enticement worked. The officer, who described the encounter, returned four days later to an enthusiastic reception. The grinning chief offered up a bonanza of information about Taliban movements and supply routes — followed by a request for more pills.