No, not a snake's penis, silly. A penis that is a snake!
Activate with Snake Penis, add snake, cobra, snake tongue , ejaculation, precum drip, touching penis , big snake penis , short snake penis, long snake penis, kiss, or _color_ snake for more customization.
It can be useful to put penis, snake tail, and disconnected snake in the negative prompts if you're having issues.
looking at another and eye contact may help with posing. close up of snake penis may work pretty well too. Should work with anthros, humans, realistic, or artistic styles.