Is adopting kids the ultimate biological cuckold? You are literally cutting off your genetic line to pamper up someone else's genetic line. Instead of reproducing yourself and continuing your genetic line, you are contesting that you are unfit to reproduce and instead you continue a dead end genetic line by raising a dead end kid with dead end genetics that they got from their dead end parents (if they didn't have dead end genetics than their parents would be raising them themselves. you are literally continuing a dead end genetic line and putting yours to a stop!)