Come on, guys. She’s just sewing the seat of his pants back together. This is a perfectly normal thing and it definitely doesn’t look like she’s giving him some weirdo butt massage; get your head out of the butter.
Butter? Gutter. …Ah whatever; the typo was funnier.
(Note: This thing is so weird looking that this isn’t even the first time it’s been featured in a yardsale blog. What’s up, ThriftHorror?)