Neither would I. So the surprising prediction, with this low prior, would be that such a person could systematically, by displaying specific behaviors, improve their chances above the base rate for someone similarly situated.

Can you give specific examples of single behaviors which have that effect? Or, if single behaviours do not reliably have that effect, a minimal set of distinct behaviors that do have that effect?

Playful teasing combined with emotionally non-reactive response to challenges has that effect reliably (and to some extent applies independently of just attraction of mates).

Strong eye contact is possibly an even stronger example. By strong eye contact I mean holding eye contact until the other party breaks it, with a slight pause from when they look away to when you do. If the other party doesn't look away quickly, this is actually a surprisingly difficult thing to do and so doing it naturally remains a reasonably effective status signal.

I cannot, for obvious reasons, give personal testament that these examples work for attracting mates even if you are ugly... but I have seen it work for others that may fit that description.