Is it normal to relate to masturbation during boring college lectures.

So, I'm in one of my elective super boring college classes taking this course is criminal deviance. Super time consuming yet really practically tedious - only there for the credit and mark boost. In some boring topics if feels my brains and mind is in the act of masturbating to some mild erotic porn but trying so hard to finish but just cant climax. That is the best description for the sensation I'm getting during some lectures. So freaky yet highly odd...