Vague Impossible Question: Women did this more a very long time ago. Today 30% of British women say they have done this. 10% American. What is this very frowned upon act?

Each afternoon around 1:38pm, I ask a "Vague/Impossible Question." If you guess today's question correctly you could win tickets to see Sturgill Simpson at Merriweather on 9/15

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Below, you will find a hint that will give you a great chance to win 

HINT:  "I'm sure its okay If i have a glass of wine, shouldn't hurt her any"