We all know evolution works. So to answer that eternal question - which came first; the chicken or the egg...;

...There were - many millions of years ago....many bird-like, egg laying reptiles....but then a few evolved that were more bird than reptiles They flew short distances...and took up the niche that would become our domestic chickens.

Eventually a few of these Reptilian-birds met....did the intimate thing (no intercourse in birds and reptiles....just touching "cloacas" where sperm from the male entered the female) and voila ...the first chicken egg occurred.

So technically; the chicken came first. When a male and female bird-reptilian-chicken-like creature met; they mated. Their children became more chicken like...and less reptilian....over many thousands of years.

Without a dildo how will you know which cums first?...

They'll send you quail eggs and screw up the research.