It's always hard for me to come up with birthday card ideas for my male friends. With girlfriends, it's easy - the cuter, the better but with guys it is a completely different story.
I was fortunate to still have some scraps of BG Archaic papers in my pile. They have wonderful masculine feel. The next thing was to search in my stamp collection to find appropriate stamp. I was sure cute Charlotte, Tildas, or Willow won't cut it this time so I had to dig deeper... and I found this naughty ladies stamp that I got for a project a while ago and completely forgot about it. Seemed pretty suitable.
Pattern Papers: Basic Grey