Abstract: A prophylactic prosthesis assembly for assisting in providing the semblance of an erection includes a body that has a first end, a second end, and a perimeter wall that extends between the first and second ends. The perimeter wall forms a hollow cylinder and each of the first and second ends is open. A two part epoxy includes a plurality of first compounds and a plurality of second compounds positioned discretely in the first and second channels. The body is comprised of a resiliently stretchable material. A head has an attached end, a free end and an exterior wall. The body has a penis removably inserted into it and the body is deformed and compressed to mix together the first and second compounds such that the body becomes semi-rigid after the first and second compounds chemically react to form a thermosetting polymer.