What are you trying to achieve? Sounds sort of like you want an extension, but those would be Female to Male?
Most extensions take 6+2 (or a solid 8) to 6+2, so you could still use a 6pin aspect. However, I do believe 6 pin extensions exist also.
A male to male, sounds like a replacement for your PSU, which would necessitate knowing which PSU we're talking about here.