The MASH movie was pretty sexual. the MASH TV series wasn't. It was implied that Hot Lips was banging around but it was very understated compared to the movie.
What passed for racy back then was "jiggle" TV such as Wonder Woman, Three's Company, and Charlie's Angels. But all that stuff was obscured by some sort of "it's part of the story" plausible deniability or layer upon layer of coded innuendo. Quite different from having frank discussions of sexual liaisons in and out of the bedroom which has now become routine in things like How I Met Your Mother
or punch lines like "sperm dumpster" in Family Guy.