I highly recommend using sea sponges as a barrier contraceptive. They are sold through alternative health stores for menstrual use. I used to use the Today sponge, until its high levels of Nonoxynol-9 irritated and ulcerated me and I started getting UTI's and infections. Pharmatex sponges were great alternatives, but I could only get them when I lived in Ireland. The beauty of the sea sponges is that they are re-usable, can be used with natural spermicides (including home-made ones), can be used spontaneously and kept in for repeated sessions, are comfortable and unnoticeable when in place, and best of all, ABSORBENT (no wet spots)!