Hmm... I kinda get where you're coming from. However you just have to keep in mind that this is fiction...and it can get very convoluted and confusing. I try not to dwell on some aspects too desperately because it is fiction....and MANY writers have put in their two-cents. So, Star Trek is based on a lot of different views and assumptions. In the Star Trek world, do Delton women have this crazy pheromone gift? Yes. Can they take an oath of celibacy? Apparently some can. Does this all make sense? Not really. Like you said, it would be practically impossible. But we're talking about a series where a main character (Spock) dies, then miraculously comes back to life (Genesis Project) then has his katra (or life essence) placed back inside his body. I basically just accept many of the Star Trek concepts because I really adore the series and it's fun to read and watch on tv.. or the movies. I just accept it for what it is...fiction. Very enjoyable fiction...but still fiction.