How to even speculate? HMMMM?
--They are 'really' into their research!?!
--What's the difference? I mean c'mon, monkeys and humans share 99.9% of the same genetic material!
--The male researchers knew, the just knew!
--Actually the male graduate students got a kick out of taking the research monkeys with them the local strip clubs where the monkeys learned to immitate the students behavoir. Boy were they surprised when a thesis evovled out of it and they got their doctorates!
Now I'm just running out of steam now!