User blog comment:B214/Question and Answers 2/@comment-37.231.32.124-20140330203936/@comment-24468758-20140331130030

Someone can try counting if that person has no real life, but I think even then it would take quite some time.

The only woman Issei doesn't stand a chance against in every area is Grayfia. Just as shown in Let's go to onsen.