>We got like 100 condoms after birth, which would mean years of sex given the stress and discomfort after birth.

Are you speaking from experience or is this just your expectation? My wife and I were back to normal pretty much as soon as everything healed up (4-6 weeks or so)

No matter how fast you'll use those rubbers, it's also good for hygienic reasons. Would be very annoying to get UTI or such when there is a new humanbeing to be taken care of.