Wait at least one week before having sexual intercourse. This may help avoid you from experiencing pain in your testicles. Keep in mind, you may not be sterile right away. Ejaculate may still contain sperm and may continue for several months after the procedure. After a few months, the doctor will check sperm levels to confirm that it is declining until it reaches zero.  The vasectomy will not affect your erections, sex drive and orgasms. Occasionally, men feel a slight pressure in their testicles when aroused, but eventually, that feeling will go away.