IHO, I just think certain things should just be between you and God!
Howevva, interms of the finances I would let him know up front that yes I do have a checking or savings account that is for me personally. This account has no affect on my household contributions and will not be used for such.
As far as sexual partners are concerned, well that's one of the things that would be between me and God! It's really none of his business and do you (generally speaking) think he will be truthful to you in his number of partners??? As long as my STD(including HIV/AIDS) results are straight, he don't need to know nutt'n else!