Oh yes indeed, as 'SoD' ('Son of Duff', for any newcomers) will confirm, I was an excellent Dad, one of the best and, according to some, er, swots at some Yankee university (thank God, so at least I didn't have to pay for them to waste everybody's time as well as their own) who have 'shown' in a study of men's testicles - and yes, you did read that right! - that men with small testes are more likely to be good dads because the apha-males with huge danglers are too busy flashing the family jewelry to actually spend time with their off-spring. To be absolutely honest I haven't spent too much time inspecting, let alone measuring, my testes but from the occasional sight of my fellow soldiers in barracks I would describe mine as, er, small but perfectly formed! Alas, exactly how small is small and how large is large is not vouchsafed in this report and there definitely do not appear to be any photos - for which we may all be grateful!
“Our study is the first to investigate whether human anatomy and brain function explain this variance in parenting effort,” says Jennifer Mascaro, who led the study as a post-doctoral fellow in the Rilling lab. “Testes volume is more highly correlated with sperm count and quality than with testosterone levels.”
Unfortunately, there is also no photograph in the story of the excitingly-named Ms. Mascaro otherwise I might have been tempted to offer her my services!