The question of how relevant animal experiments are to humans is one that is likely to drag on and on but I think it is foolish to draw conclusions about men from this study of worms. Given that we have the black widow spider that eats her mate and some other insect that, rather than laying her eggs, lets them hatch inside her and eat her from the inside out, I think it clear that things are a bit different in insects.
My suspicion, in men, is that it will depend on how well nourished we are. It has already been noted that women's periods can stop if their body fat drops below a certain proportion as if this is a built in mechanism that, when times are hard, it is better to delay breeding and keep the adult alive than to increase demand for food by having a baby. That's a strategy that works for things with a relatively long life whereas many insects have only a short life - in some cases breeding only once.