If you google 'meaning of butterflies' you'll see quite a bit of fantasy & folklore. Apparently, there is an Irish saying that butterflies are souls passing through purgatory.
Other interpretations are that they are messengers letting you know that something good is going to happen to you. One of the good things is improved sex life
Butterflies symbolize transformation--a change for the good.
Somebody was 'obviously' trying to tell you something
OR.....You smelled like a flower or fruit, my guess would be your lotion, or hair stuff was getting their attention.
I had this happen with my honey bees, unbeknownst to me I had a hair product that had lemongrass oil in it, guess what they bees associate with that? A queen, so everytime I went by a certain hive we had, I would get stung in the head, my H thought I was nuts, until one morning I was drying my hair, and there it was on the can of root booster, Lemongrass oil.....
So I guess you should be happy it was butterflies, cause getting stung in the head sucks. LOL