What was he thinking?

I do a baby/toddler storytime each week for caregivers and their little ones. It's a highly interactive experience where the attendees can't be afraid to sing along and look a little silly. Once in a blue moon I get a Dad to participate in these storytimes and I'm always happy to have them. However, I wasn't so sure about the Dad that showed up this week at my storytime.

He walked in, all tatooed, and on his shirt proclaimed the slogan: "Watch midget porn: it will make you feel larger." The mothers with their babies looked at this Dad warily out of the corners of their eyes and shifted in their seats. I think I saw one grip her toddler a little tighter. Now this Dad was great during the storytime and there were no further incidents.

However, afterwards, I asked myself: "What was he thinking?" When he was picking out his clothes in the morning did he say to himself: "Okay, well I'm going to a baby storytime, perhaps the midget porn T-shirt is most appropriate." I don't know what his thought processes were, I'm just glad none of the babies can read yet.