"he was a bit weird" doesn't even begin to describe things... If you read the original unabridged version of Stranger in a Strange Land it's obvious how it's a product of its time in the 1960s, and Heinlein's own fascination with polyamorous relationship ideas.
In the me-too era much of Heinlein's work is problematic, to say the least.
In the me-too era much of Heinlein's work is problematic, to say the least.