I honestly don't know if it's possible, but there have been cases where I've smelt what I can only describe as pure pheromones... It's a scent that goes deep into my animal nature, snaps my head around, makes me bare my teeth and want to hump the woman's legs (at the very least).
This has happened to me on the train. Many years ago. I caught a whiff of a random guy and ... instantly flooded my knickers. He had NO IDEA I was standing next to him shaking like a leaf in the wind. I think I even drooled a little bit by accident. I stared out the window and tried to think of unsexy things, like Margaret Thatcher.
After that happened I started taking notice of people who made my head turn .... people who were perhaps not necessarily what I consider visually-attractive. I wondered if it was pheromones. Once I had tuned into this, cruising the clubs for a shag at Sausage O'clock (generally between 03:30 and 04:00) got much easier. The combination of hunting out pheromones, devilish flirting and reading body language seemed to guarantee winners every time. And they weren't always the spunky looking guys.
I also realised the best pheromone attractions were a two-way street. It wasn't just what they were putting out. They had to be into my scent, too. Many years ago I had a bf who used to sniff my neck a LOT. He said one day "Ohh my love, I don't know what it is about you. I just love your smell. I could lie here and breathe in your personal scent all day. I know you don't wear perfume. That's what makes it special. It's all you. I just love being in the scent of you." I didn't understand it at the time, but in hindsight now I think I do.
You can't force it though. And I believe it can and does change with time, and perceptions.
Then, in November last year, a boy came along who blew the lid off the pheromone jar. Our attraction was INSTANT in BOTH directions. Red hot sizzling from the minute our eyes met. We were in a swimming pool and not even the strong smell of chlorine could detract from the powerful SOMETHING that pulled us towards each other. Was it sexy confidence? Alcohol? Good humour? Love of music? Whatever it was, it took us both by surprise. Only later did we consider that it might've been fuelled by pheromones.
We locked onto each other that night, and the next four months were the hottest, filthiest, kinkiest, most-physical, trust-based, highly-communicative, longest-orgasms-ever summer of sex I'd ever had in my life. Four months of being unable to keep our paws off each other, no matter how much we disagreed outside of the bedroom. And the lounge-room. And the kitchen bench. And the coffee table. And the hallway. And the shower.
Pheromones did a great job of igniting a spark in attraction that I think would otherwise have been ignored.
We made rabbits blush.
