This is extremely useful information. Magnus's research between asking everyone for the talk and Alex's arrival (i.e., consuming vast tracts of pornography) hadn't made it clear whether there were big differences in types of acts, and though he definitely spent considerable time envisioning each one, Magnus's only real frame of reference has been masturbation. He makes a mental note, and then mentally circles it three times, highlights it, and underlines it. "Oral, huh?" he says. "Great tip."