DeathA: посты

В тексте попалось вот такое предложение. Контекста особого нет, просто небольшое собеседование в три предложения. Его отстранили от работы за что? Не могу понять, как перевести выделенное.
Интервьюер назвал его фетишистом, прям уж очень интересно.))

Actually, I retired a year ago after selling a patent for a durable, lightweight concrete proxy I developed while I was at MIT.

Весь диалог

Интервьюер: So, where do you see yourself in five years?
Ответ: I'll probably be in Africa helping to build irrigation systems on a voluntary basis using my experience as a structural engineer.
Интервьюер: Hmm, interesting. You don't work any more? You a trust fund kid?
Ответ:Actually, I retired a year ago after selling a patent for a durable, lightweight concrete proxy I developed while I was at MIT.
I also model for department store catalogs on the side, so I get a bit of income off of that, though I don't like to bring it up in casual conversation.
Интервьюер (себе под нос): Volunteer fetishist. Part-time model, not for anything you've ever heard of. Proceed with caution.