Hello, my girlfriend and I intend on having sex with me finishing in her. She does have an IUD in place, however, in order to console her I offered to buy her a Plan B pill because she is up for the idea of me finishing in her BUT is concerned about being part of the failure statistic. Is there anything wrong with coupling the IUD with a Plan B? Is there potential that it could be counterproductive? If you get the chance, please let me know.