A SpaWeekBlog.com's anonymous writer recently vajazzled herself and tested this out with her man. It's not a problem at all. The crystals aren't sharp. They don't cut into or grate against the man.

She said the woman who vajazzled her indicated you’re not supposed to have sex right after you’re vajazzled. I’d thought there may be laceration involved (did I mention the crystals?), but there was no problem with it for us; unless you count vajazzles everywhere as a problem.

http://www.spaweekblog.com/2010/03/24/vajazzling-the-mans-experience-dur...