Hi Philly,
Have you ever had what I would describe as a "no doubt/without question" outbreak in this area where you are getting the cuts? An o/b can be caused by friction, but I'm trying to get more info so I can tell whether this really is an outbreak or if it could be a friction irritation caused by sex. Does the area just feel raw or do you get the associated tingling in the area?
My DH and I don't use condoms but in past relationships, condoms were used (unfortunately not with the guy who gave me this

). Even though natural lubrication has never been a problem of mine, the condoms caused me to be sore, red and burning for a few days but I could tell they were not o/b. So to stop this from happening we used gobs of lubrication and it helped tremendously.
Regardless of whether these are outbreaks or simply irritation, I would strongly suggest using a lot of lubricant and see if it works. The spermacide condoms could also be an additional irritant but I guess you could try them with the lubricant and if it doesn't work, have him switch but still use the lubricant.