heteroflexible
A FORM OF A SEXUAL ORIENTATION OR SITUATIONAL SEXUAL BEHAVIOR CHARACTERIZED BY MINIMAL HOMOSEXUAL ACTIVITY IN AN OTHERWISE PRIMARILY HETEROSEXUAL ORIENTATION
Homoflexible; Heteroflexibility and homoflexibility; Heteroflexible; Homoflexibility; Mostly straight; Hetero-curious; Heterocurious; Straight-curious
Someone who is primarily heterosexual but may engage in some homosexual acts. Not a synonym for bisexual.
I monk dates women almost exclusively, but he's been known to be heteroflexible from time to time.