the only people who could conceivably fall in love to a spock's beard song would have to be like fat, square-jawed dungeons and dragons players. (sticking to the classic ad&d 2 ruleset or course.... thac0 4life.)
the akward-ness and utter horror of performing the physical act of procreation to a pain of salvation song would no doubt leave the participants and any unfortunate onlookers would leave terrible emotional wounds that only a life-time of therapy could hope to asuage (but never fully eradicate).