Given the nature of the subreddit /r/sex, individuals who browse /r/sex may be even more "sex-positive" or open about sex than other participants who volunteer for sex research, resulting in greater acceptance of casual sex, more experience with casual sex, or even greater sexual satisfaction (see Wiederman, 1999, for a review of self-selection bias in sex research). 91) than for all other participants (3.45), t(246.2) = 3.87, p < .001.