Two years ago, S. Asher Gelman made a splash with his first play, Afterglow, which examined a threesome of gay men. Scheduled to take advantage of Gay Pride month, it ran well over a year. Gelman’s second play, Safeword, has more challenging subject matter. The title comes from BDSM, which is, for those who haven’t read Fifty Shades of Grey, bondage and discipline (BD) and sadomasochism (SM). This time, however, Gelman’s plot feels more contrived, and its effect isn’t as strong.