Intercourse, whether through vaginal or anal penetration, is just one form of sexual intimacy. The options, as you suggest, need not be limited to these alone. Whether gay, straight, lesbian, or bisexual, many couples enjoy kissing, massage, foreplay, fantasy, frottage (the French word for body rubbing), mutual masturbation, or talking as other ways to enjoy one another and arouse the senses. While lower risk than anal sex, oral stimulation can be another satisfying option, but keep in mind that “going down” can still lead to sexually transmitted diseases (STDs) like herpes, gonorrhea, and chlamydia.