I was explaining a saying that you’d queried.
When good men stay out, bad men stand out.
Good men don’t helpfully offer to assist teens with lingerie shopping. So bad men stand out when they do.
I didn’t say all men in lingerie departments are suspicious, though it does put the other women off their shopping, frankly. I don’t fancy shopping while a guy is browsing the bras wondering which one he’ll fancy her in most.
A lot of us pointed out that we don’t get approached by shop assistants in M&S. I’d say men buying for partners probably are approached as they are more likely to need assistance and the staff probably want to help them to complete their purchase in a timely fashion 😅