WHAT IS A JOINT STAG AND HEN DO CALLED CAN BE FUN FOR ANYONE

A stag night is normally planned via the groom's Good friend or brother, In cases like this. But what about a hen do? Similarly, a hen do is often a bachelorette party. Hens are feminine chickens, but what could be the "do" mean? And isn’t it a little Strange that they don’t transform at least among the list of names into a doe party or perhaps