Darth Id said:
What's most astounding is that he takes great, funny snide remarks delivered with peerless spirit (otherwise known as great humor), such as "You're brave than I thought," and thinks it's "dumb humor" because he mistakes it for crass innuendo, due to the incessant proximity of his mind to the gutter.
On the other hand, the bit where Han is pushing on Leia's hindquarters as she grimaces and manipulates a giant rod, I do think was intentionally suggestive, albeit too subtle for a kid to ever wonder, "wait what's going on?"
Innuendo? No. I never picked up on it unless taken out of context without the pictures.
The mouse droid is borderline Prequel humour as is R2-D2 toppling with a cute scream as he gets stunned by the jawas. However it's not awful, but it is dumb in my opinion. Where dumb is defined as "lacking intelligence or good judgment; stupid; dull-witted."
Leia's "walking carpet" line has always bugged me, do we even see a carpet anywhere in the trilogy? It's an instant back-to-Earth-ism for me that line. And it's not even funny. "Nerf herder"? Thank you ESB!
Of course, I also had to filter out the Star Wars SE awful awful awful dumb humour, which makes the regular dumb humour passable and hardly worth mentioning because there is so little of it - but it is there.