Related anecdote:-
Long ago my ex-wife walked in on our oldest daughter (who was 15 at the time), shall we say some "heavy petting" was occurring on the sofa with her well "topped and tailed". Wifey beat a hasty retreat.
Next day said daughter was hauled off to the local Family Planning clinic, logic being that you're not going to stop them experimenting, so let's avoid having any little miracles just yet.
Daughter told the clinic that she didn't want the pill as it "would make her fat!". So she was given a box of 144 Durex in a not quite opaque bag, to ride home on the bus!
For some reason the pill became a hastily chosen alternative (they were in an opaque white bag).
I can't imagine why she changed her mind