Harahan Police Chief Tim Walker told news outlets 24-year-old Anthony Kennedy and 22-year-old Rayna Fillios were arrested on Saturday.
The victim told officers he gave his telephone number to Fillios when she hailed a ride. Fillios called and asked him to come over.
He said Fillios was topless when she opened the front door. Authorities say Fillios grabbed his arms, pulled him to her chest, kissed him and bit his tongue to distract him.
When Fillios let go, Kennedy brandished a knife and told the victim to hand over his money. The victim refused and Kennedy punched him.
The couple was charged with several offences including armed robbery. It's unclear if they have lawyers.