Indeed, that he would even remotely imply that is just bizarre. I mean there are junior high and probably even elementary school kids who have taken sex ed that have a better understanding of what happens during sex than lucas does. I definitely think you're on to something with the fertilization fetish, which also might explain what he was doing creeping around on bdsm sites in the first place as those kinds of places tend to have creepy breeder fetishists skulking around. Though to be fair even those types, degenerate as they may be, at least understand sex and reproduction better than lucas does
and on that note, lets not forget that lucas has repeatedly made a point of bringing up the fact that when he was in school 'getting his PhD' one of his end goals for said education was to somehow get some zoomer eggs and genx sperm (gee I wonder who he thought was going to provide that), literally mix them together in a lab setting to see what happened and prove his 'theories' which I suspect was feeding into said fertilization fetish. He wasn't just being a dumbass who had no understanding of how research works he was deliberately injecting his fetish into his supposed future medical career, in a similar way that psychopathic surgeons get off on all the blood and cutting they do while performing surgery, except lucas literally gets off on it
EDIT: He posted another video
Showing how much of a racist he is, while managing to center his entire schizo rant on the food aspect
Yet again showing how racist and food obsessed he truly is