Ignoring the figures in the background, the panels show:
man
woman
dog
three women
woman
woman
woman and man
woman
woman
men and women
man in drag
two women
two women
That's quite a female bias there, but it does make sense.
If you want to attract women to Student Union events, you show pictures of women; if you want to attract men to Student Union events, you show pictures of women.
We don't have a marketing degree at Essex University, but someone in the Student Union seems to have a handle on it.