It may have been a one-night drunken fiasco. It may be the first time in during a long-term relationship. Regardless of the circumstances, the deed is now done, and you have allowed for your man or fling to ejaculate inside of you. The thought of protecting yourself may have crossed your mind as you began kissing, but before you know it, you are already in the act. There isn't much you can do now. There are many feelings- some exhilaration to panic, that you may feel when you notice that he is beginning to climax.