There are several answers:
I think you have to be an expert at having sex or you just have to know about it.
You need to get training on it, do plenty of practice and experimentation on it and do some exams to get some qualifications in using it.
what qualifications do you need to become a health visitor
you have to be male
what qualifications do yu need to become a driver instructor
qualifications to be a grond hostess sri lanka
You need talent to become an actor
You don't.
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gcses
GCSE
a PHD in psychology.