Heterocontextual
A person, ususally a guy, who identifies himself as "straight," who, IN THE RIGHT CONTEXT (usually quick & easy access to a willing partner), will eagerly engage in sexual activity with a person of the same sex.
For a guy who calls himself "straight,"Victor gives damn good head. He's a hetero all right; a horney heterocontextual; he'll do whomever's there in order to get his nutt.