It shall be lawful for any physician licensed by the Board of Medicine to perform a vasectomy, salpingectomy, or other surgical sexual sterilization procedure on any person 18 years of age or older who has the capacity to give informed consent, when so requested in writing by such person. Prior to or at the time of such request, a full, reasonable, and comprehensible medical explanation as to the meaning and consequences of such an operation and as to alternative methods of contraception shall be given by the physician to the person requesting the operation.