Suffer is perhaps not the correct word here. I think shminux is thinking of experimenters wining and dining (or not) and then having sex with monkeys.
However there is a totally viable experimental design with monkeys, if any monkeys exhibit gift-giving as a part of mating—just make sure that the males have some resource, train some to give the gift and some not to, put them in a position where they’re trying to win the attentions of a female, and watch what happens.
Suffer is perhaps not the correct word here. I think shminux is thinking of experimenters wining and dining (or not) and then having sex with monkeys.
However there is a totally viable experimental design with monkeys, if any monkeys exhibit gift-giving as a part of mating—just make sure that the males have some resource, train some to give the gift and some not to, put them in a position where they’re trying to win the attentions of a female, and watch what happens.