"guns don't kill people, Henry Lee Lucas kills people."
Let's start with Mom. Remember, our earliest impressions are formative. The word formative means that attitudes and behavior begin early, early, early, so exposure to certain sensitive material is bound to be formative. You might wonder, what type of material was Henry exposed too? Here is one image:
Viola Lucas, part Chippewa Indian, short at 5'2", alcoholic and providing sexual services to the local community didn't mind that her husband, missing both legs and her two boys watched as she spread her legs, indifferent to the rhythmic pounding of her paying customers, actually enjoying the drama of being completed exposed in her activities. (see page 19 of Henry's confession)
For some odd reason, Henry was sent to school in a girl's dress and with long, curly locks. The teacher intervened and gave him overalls and made sure he got a haircut. Viola had none of it.
From the tensions in the home to solitary sex in the outhouse, Henry sought to find some relief from the stress of growing up in depraved circumstances.