It's 2018. Dick jokes and "your girlfriend" examples have no place in software engineering, not that they ever did. That holds doubly true for a project whose target audience potentially includes people who have reasons to protect their identity.
As potentially better examples: contributions to the bitcoin repository tend to result in spam from random people who think that the list of every contributor to bitcoin is the right list to send random cryptocurrency spam to. Or, you might want to contribute to the https-everywhere repository without revealing sensitive sites you're contributing entries for. ("Potentially sensitive" here could mean a wide variety of things, such as sites for sufferers of a particular medical condition, sites for organizations whose members regularly get targeted, etc.)