When I listen to some songs that are around 100 years old, I get the feeling of watching a cartoon. I like them, anyway, maybe because of that, .. I do not know.
This is at least about something as adult as having sex. I think "Makin 'Whoopee" became synonymous, slang, with having sex after the song became popular, but you Americans know more about that.
Popularized by Eddie Cantor, apparently. I did not know that. However, have heard this version before:
Edit:
Although most pop songs then as now are about relationships, love and sex. Perhaps with the exception of the beginning 1950, mid-1950s. Then it turned out to be very chaste. I think it seems like.
en.wikipedia.org