Are you using a spermicide of any kind (either by you or, on a condom)? Are you douching with anything or using highly scented soaps in the vaginal region? Have you had any recent vaginal infections such as a yeast infection? Are you using condoms (may be a latex allergy in which case, switch to a non-latex brand).
Are you lubricated enough because friction from intercourse can be irritating to a male's tender penile skin.
If none of these apply to your situation (it may be an allergy to any of these things he's experiencing), he may want to ask to have a swab done to test for an STD. Some STD's lay dormant for years so, sexual relations prior to his monogamous relationship with you may still be there and vice versa for you. It's a small chance but, one that bears thought and a talk with his doc about.
no. i have an iud, rarely use condoms since were married. hardly ever use lubricant even though sometimes we should. we have been looking up info and it sounds kinda like herpes. i had a yeast infection early this year or late last year and the problems started shortly after that i think.
i forgot to add that i dont douche. i was told not to after i had the yeast infection