Apparatus that enables non-penetrating sex between two users. Embodiments may be integrated into or attached to clothing worn by the first user. A tubular element (including, but not limited to, a male or female condom) may be installed either permanently or detachably; attachments at both the open and closed ends of the tubular element ensure that it will not penetrate the first user. Users may therefore enjoy many of the benefits of sex, including intimacy and mutual stimulation, without the risks inherent in penetration. Attachment for the open end may use for example an element that attaches to a base ring or flange at the open end. Illustrative attachments for the closed end include a loop into which the closed end is cinched, a notch or hole into which a button in the closed end is inserted, and a mechanism into which the closed end is inserted, folded, and secured.