I’m a fourth year PhD student in the life sciences, and I need mentorship, preferably from a Slytherin, or at least someone with a Slytherin hat. My advisor doesn’t want me doing “mercenary collaborations”, or quick experiments with researchers outside my field in exchange for secondary authorships. He says I need to focus on my thesis research in the next year so as to publish and graduate. Are there any academics in the LW readership who have the insight to tell me whether this is good advice or whether he just wants me pumping out papers with his name on them so he can get tenure?