A fascinating study has found that sniffing female tears significantly reduced male aggression and decreased activity in aggression-related brain networks. It’s suggested that the effect, which is caused by chemical signals in tears and is also seen in rodents, serves a protective function.
I have experience and yes, it would not make it much more complicated. two types of controls are actually common although using male tears would not be a control. but like 5 research targets and 2 controls would not be beyond belief.