Grew up in PA hating Penn State so cheered for ND when they played them, but really considered myself a ScUM fan. When I got to college (small school in PA-the only one I could afford cause I had to pay my own way) my freshman year at Christmas, Mom asked me what I wanted for Christmas. Having no clue, and we were walking through a mall, I saw a ND sweatshirt that looked pretty cool and casually said, "Well, that looks good. Why don't you just get me that."
Well, that Christmas, I did not get the sweatshirt. Instead, not knowing I thought I was a ScUM fan at the time, I opened presents and got Irish boxers, 3 Irish t-shirts and an Irish Jacket (which I still proudly wear 19 years later). Probably more Irish stuff than that, even. When I asked why all that and not the sweatshirt, she said the sweatshirt cost so much and she could get me all this stuff for the same price (it was an expensive sweatshirt).
Not wanting to break her heart, I just take it to college and wear it. Only people start giving me grief when they see me wearing it and the Irish lose. So I had to start keeping up with the games to know if I could wear my Irish paraphernalia or not- and, next thing I know, I'm hooked and an Irish fan for life. Sorry for the long story but that is the truth.