However (comma) it at least starts out depicting something in the text.
Historically, men have been the peacocks and women mostly dowdy. Heinlein was depicting a semi-return to that — at one point, Long and another “manly man” exchange comments on one another’s fingernail polish — but instead of returning to modesty, the women are working hard to keep up. A truly faithful cover would be R-rated at best.
In the book, the girl isn’t wearing a bodysuit; that’s paint, and she has painted sunburst patterns centered on her nipples and navel. (My reaction at the time was that either the paint was unsmearable and thus difficult to remove or change, or her makeup time in the morning was some hours.) Lazarus Long’s kilt is electric blue; the artist probably made it tartan pattern because otherwise it would just look to most people like a man wearing a skirt.
The ‘N’ and ‘L’ joined together in Heinlein look like they’re specifically pointing down to the title part ‘Methuselah’s Children’. He must need to do that so that we are not distracted by the huge font that is used for his name.
@Kaji: Yup. Though in fairness, I don’t think the text ever mentions the color of Lazarus’ hair (this was the story that introduced him, and I think pre-dated RAH’s fixation on redheads. Not that there’s anything wrong with that – I like them myself.)