Normal for straight girl to French kiss another girl for 5 minutes?

Anonymous
I found out my girlfriend French kissed another girl for five minutes for a dare before we got together. I understand straight girls can kiss for dares but is five minutes a little too long for just a dare? She also said the dare was supposed to be a regular kiss but the other girl starting giving her tongue and she did it back the entire time. If it's not part of the dare to French kiss, does it mean anything that they took the kiss to that level when they didn't have to? Thanks for your input!
Normal for straight girl to French kiss another girl for 5 minutes?
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