Adding that Jack was in college w/Will and Grace and was the one who told Will to face the fact that he (Will) is gay b/c Will is in denial. On that episode, Will proposes to Grace in order to get out of having s#x w/her while they're visiting her parents. Of course, the engagement lasts less than 24 hours. This is all from the great "flashback" episode that has Jack wearing braces and living in his parents basement and acting like ... well ... Jack. IE: the phone is ringing and, although the phone is right near him, he keeps yelling for his mom to answer the phone. V. funny!