i have the real answer - its not only an answer but a solution for these type of question for both men and women.
Why do you look for different partners ?
Why dont you select the right one in the begining and settle for one - woman who can do all that you please and you do all that she pleases...... i have been in love and married the same female after 12 years and now married with 2 children for 13 years - i do not have any problem during these days that is 25 years i have never slept with any other women.
Here you will find understanding its not only sex
but there is Love + sex = fun