Menstuff® has information on Outercourse.
What is outercourse?
But outercourse does take some discipline! Both partners must be committed to this method. Or else these exciting forms of sexual intimacy can lead to sexual intercourse. It is not an extremist position to practice only outercourse in this age of viral infections. It works better if there has been communication in advance. Decide in advance what sexual activities you will say "yes" to and discuss these with your partner. Tell your partner, very clearly and in advance, not at the last minute, what activities you will not do. At the same time learn more about the methods of birth control and safer sex so that you will be ready if you change your mind.
What are the advantages of outercourse?
What are the disadvantages?
What can be done if plans change and a man and women have
unprotected sex? Sperm swim very fast. In minutes after ejaculation
into the vagina, sperm are up through the uterus into the fallopian
tubes, where they will meet up with the egg, if an egg is there. Read
about Emergency Contraception, a method that can be used after
Source: Adapted from Hatcher RA et al. Contraceptive Technology. 18th rev. edition. New York, NY: Ardent Media, 2004.