Sugguest you go to the below link, you will find your answer and many more answers to questions on sex. It is the site of Sue Johanson Canada's foremost sexual educator and counsellor, recipient of the distinguished Order of Canada.
For the last 30 years, she has provided frank and honest sexual education to thousands of Canadians through her lectures, radio programs, and the Sunday Night Sex Show on television.
I am not assoicated in any way with this site, or anything sold on the site, I am just a fan of this wonderful woman. She provides free information on many sexual topics.
I wish you the best.