A lot of guys pretend nothing bugs them, but they're usually just ACTING that way, because they don't want to look weak.  So the relationship site YourTango.com listed the seven most common things they DO worry about.  Although, they're all things women worry about too. . .

#1.)  How Much Money They Make.  Ego is definitely part of it.  But more money also means more flexibility, more security, more status, and fewer concerns about things like retirement, vacations, and putting the kids through school.  That's not to say women don't worry about it too.  But being a good "provider" is something a lot of guys feel even MORE pressure to live up to.  Which is why you should pay bills TOGETHER, so you both share some of the stress.

#2.)  How Much They've Accomplished.  It's usually something guys think about WAY too much as they get older.  Right around the time they start having a mid-life crisis.  Basically, they look back and wonder if they could have been more successful if they'd just tried a little harder.  Which can sometimes be MOTIVATING.  But it's usually just DEPRESSING.  The best thing to do is talk openly about it.  But bringing it up with your significant other, who you've BUILT your life with, isn't easy.  So most guys just bottle it up.

#3.)  Their Bedroom Skills.  They mainly worry whether you're actually satisfied, or just FAKING it.  Or, if they're being realistic, how FREQUENTLY you're faking it.  Most guys are open to advice.  Just don't tell him he's doing anything WRONG.  Instead, tell him a few things you want to TRY.  That way you won't bruise his ego, and you'll reassure him that you ARE having a good time.

#4.)  Job Security.  This one kind of goes hand-in-hand with "how much money they make."  And worrying about it too MUCH can cause family and relationship problems.  Which is ironic, since the main reason men worry about losing their job is because they don't want their family to be in a bad situation.  So it's good to be supportive and remind him that you're in it together, NO MATTER WHAT.

#5.)  Losing Their Looks.  Women worry about getting old just as much as men do, or probably more.  But guys are more likely to never talk about it, then do something to over-compensate, like have an affair, or buy a convertible.  In the end, most guys just want someone to make them feel WANTED from time to time, just like women do.

#6.)  Losing Their Health.  Pretty much everyone is worried about it on some level.  But men are more likely to want to IGNORE a health problem and not go to the doctor.  So sometimes they don't tell anyone.  Which means if there IS something wrong, it'll get worse.  And if there ISN'T something wrong, they'll keep stressing about it.

#7.)  Their Parenting Skills.  Even if they don't have kids yet, guys worry a lot about whether they WILL be a good dad.  At the same time, most women worry about whether they'll make good MOMS.  So it's something men SHOULD feel comfortable talking about.  But they don't, because it's like admitting they're afraid of something.

(YourTango)