I have made a swarmplot with seaborn, but I can't seem to find the option to make the dots overlap with each other. 

They overlap with each other, but only at the sides. 

I would like them to make overlap everywhere when they would not be able fit, but now they only overlap at the sides. 

```
data = sns.load_dataset('iris')
sns.swarmplot(data=data, y="sepal_length", x="species", edgecolor="black",alpha=.5, s=15,linewidth=1.0)

```

[![enter image description here](https://i.stack.imgur.com/bZbYf.png)](https://i.stack.imgur.com/bZbYf.png)