What happens if you tell a mathematician that you are worried because you have 1 in 3 (33.33%) chance of being raped?
They will tell you that if a rapist attempts to rape you three times in a row the chance of NOT being raped equals
(2/3) * (2/3) * (2/3) = 29.63%.
So your probability of being raped at least once is
100 - 29.63 = 70.37%