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?"