I have often posted that the various smells of my wife start making my penis erect in my cage. I have always been susceptible to Pheromones. Seems that old time song writer Cole Porter knew this and had a way of words to describe it. You can listen to the song for free or buy it for $.99. The words are also there at: https://marilynrucker.com/track/177712/i-love-your-smell