A growing body of research suggests that frequent sexual activity has brain benefits. For instance, a 2010 study on male rats discovered a link between sexual activity and neuron growth. Specifically, rats that were allowed to have sex daily over a two-week period demonstrated more neuron growth than rats that were only allowed to have sex once during that time. Likewise, a 2013 study—which also focused on male rats—found that daily sexual activity was linked not only to generation of more new neurons, but also to enhanced cognitive functioning.
Smaller studies with humans suggest the effect is present in humans as well.