Infidelity and ADHD

Has anyone had to deal with an ADHD partner's wandering eye? I discovered my husband's profile on a free dating web site.  He hasn't posted a picture and the site is known to be a joke.  But I am just wondering if anyone has experienced this.  I know the hyper focusing and need for new and exciting ventures is appealing to the ADHD person. I'm just trying to get my head around it.  It happened before, long before we were married.  And nothing came of it.  I just thought I'd ask everyone here if this is a common thing or not.