A "Sperm Donor Relationship" is one in which two people come together - have karma to create one or more children after which they realize their relationship doesn't work and probably never did. The relationship generally ends with emotional and financial baggage. This may sound silly but I've discussed this with hundreds of clients, and it make sense to them. Female clients and I usually laugh and say the man - sperm donor - should have left 'it' in the cup with no strings attached and moved on.
2014: Legal Issues - "Deliver Man"
2017: The Crown Jewels ... of England