Recently, I read an advert in a local Chinese daily, it read:
Surrogate father services available for unpregnant, unable to conceive woman: Healthy, medically certified and fit male companion till you achieve a positive pregnancy test. Free service with no strings attached- neither emotinal nor financial. Anonymity guaranteed.
- This guy can not be called a "surrogate father", because he is not going to serve as a father figure.
Another expression could be sperm donor or more specifically, a sperm bank. However, the ad does not seem to fit in this category.
Gigolo came to mind but since the service is free, it cannot be categorized in the same league as prostitution.
What can he be called?
Edit- A natural inseminator?