(Click on any of the above images to take a better look!)
During this time period pornography was strictly illegal in the USA so Tijuana Bibles had to be sold under the counter. The characters in them were movie stars popular at the time (Mae West, Joan Crawford, W.C. Fields etc.), other real life celebrities like Babe Ruth and President Franklin D. Roosevelt and especially comic strip characters (Betty Boop, Blondie and Dagwood, Dick Tracy, Popeye, even Donald Duck and Mickey Mouse!) All of these characters were shown engaged in every sort of sex act imaginable. I imagine millions of boys and men during this era jacked off to these nasty little comic booklets, about the only pornography available unless you had access to stag films which were also totally illegal.
I never saw any of the Tijuana Bibles until I was in high school in the mid 1950's. The kid sitting next to me in my 10th grade Chemistry class (I think his name was Leland) brought a couple of them to school and was looking at them, concealed in his text book. Holy Shit! Instant fucking boner! To this day I remember my dick was throbbing in my jeans and I thought for sure I was going to shoot my wad without even touching it right then and there! Needless to say I didn't pay much attention to what the teacher was saying in class that day.