[It's just a supposition!] Why do most jokes have hints of sexual innuendos?
Because it's easy - like your mom, hey-ooooooh!!! 😛 (I kid, I kid)
It's because you're all sinners
I find that a lot of Mexican humor is a lot like that. We even have a word to describe that type of humor- “albur”.
We find sexual innuendos funny because as a society we're sexually repressed.
Because a good sense of humour is wifey material.
I think it's because sex is usually a bit taboo in conversations so it spices it up with a level of risqueness that most people can relate to
Lemme tell you a secret. THEY'RE NOT REALLY JOKES!
My gaaad they'rrrrrrre
Do they? Depending on culture they have hints of sexual character or violence or faecal character or a mixture of these but many have religious innuendos, especially those of sinister and insulting character I think.
I'm not sure but I feel that's the case ...
Lack of true humour