Worth a look if you've not already run across it--fleshed out reasonably well from a short story by Rod Serling.

Speaking of flesh: Chris Warfield, the lead actor here, later had a career as a director of sexploitation films in the 1970s, the follow-on to the "roughies" we've discussed here off and on over the years; his first film, LITTLE MISS INNOCENCE (1973), works through a wacky but wanton premise that was later modified into an "arthouse" take on the same material with more mainstream actresses in the lead roles: DEATH GAME (1977), featuring Sondra Locke and Colleen Camp.