friday lectures get punchy

verbatim:

professor: *waxing on about the mutation of colorblindness* and it's a totally normal effect in about 5-8% of the male population
student: *raises hand* yeah, i'm colorblind and i can't discern between the two lines
professor: ok, that's totally normal - you'll still be able to reproduce prob...prob...without any problem. that is, you'll propagate the defect on to your grandkids.
*rest of class is dying laughing*
student: i already have a daughter!
professor: i see you've already passed it on then.