Part of the show Science of Sex, Smell and Pheromones...
Do gay men respond to pheromones from other men, as men do from women and women from men?
It's still very controversial. We are not entirely sure whether 'the chemistry of love' even applies to humans. Even if we do send off pheromones, it might be hard to detect them under all the perfumes we use. Humans spend billions of pounds on aftershave and perfume each year.