Some men actually read a pregnancy book to learn all they can about birth. Some men have to be elbowed in the Childbirth Education class because they are beginning to snore. Some men are excited about the baby coming, but not sure they can support her when things get really tough. Some men hope that their wife doesn't grab them by some tender spot on their body and scream obscenities at them. Every man is absolutley different from any other.
Every birth is absolutely different from any other.
Doulas are not able to be at every person's birth. Not every person wants a doula at their birth. Sometimes one parent wants a Doula and the other does not. Sometimes the Doctor does not want a Doula at the birth. Sometimes Doulas get calls from Doctors looking for support for a patient.