A little uneasy.

If it really makes you uncomfortable then you should tell him, and suggest that he seek professional help.  Otherwise,  if you are comfortable with giving him advice then you should offer him some. It is clear that he is sharing his problems with you because he is looking for some good advice. Good luck.

Does it feel like he is trying to see if you would be interested in "helping" him, or do you think all he really wants is advice?  Just remind him that he is married and that as a friend, you can give him some advice as long as it stays platonic. 

Hi Laura,

    This married man confiding in you their marital problems is not a good idea.  Oftentimes sharing secrets and problems with a married man will lead to an unwanted relationship and this tantamounts to cheating his wife.  Just let him know that you are not going to get involved in this and that it's best for him and his wife  to consider marriage counseling.

 Give him advice one time ..... Tell him to talk to his wife about his feelings and seek some professional help .  Be careful and watch yourself do not get involved in this man's marriage .   It is not healthy nor is it right for him to be talking to you about their sexual problems or any other martial problems they may or may not have .    He should be turning to his wife not you .  You may end up with an extremely bad encounter with him and his wife ,  he is breaking a bond with his wife , disrespecting her and is betraying her confidence , by inviting you in to their bedroom . NOT GOOD !  How would you like it if your spouse went to another person to complain about your sex life , most women and men  would be upset and would feel betrayed . He may be looking for an Adultress and is testing the waters with you .   DO NOT get involved .  All married men who are looking to committ adultery ALWAYS say their sex life is bad , or my wife does not like sex , we no longer have sex , she does not understand me , oldest lines known to man .  If this is his game do not play it , if he is truly looking to work on his marriage , then again tell him to talk to his wife and seek some marriage counseling .   I have many male friends would never talk to them about their martial problems .  And I think you know this is wrong ,  since you feel uneasy , as well you should .  These conversations with this married man are not appropriate .

if hes having issues with his wife he should really talk to his own wife and maybe they both could seek help from a professional