There were a lot of jokes that I thought were pretty risky too.
Like Elaine sits the weekend on Seinfeld's apartment and Seinfeld put a couple of rules up, one there being "no sex", "and if you really can't help it, do it in the bathtub, that makes it easier for everyone to clean up"

What really surprises me as well is how women are dressed in the first season (1990). So old fashioned

Best joke so far...Jerry goes to the bank with George, where George is holding a huge jar of nickles and dimes...
Jerry says "why are you holding on to that jar, how much money is that going to be anyway?"
George "Are you crazy? I heard someone paid his vacation with a big jar of change!"
Jerry: "Vacation to where? To the penny arcade?"