as someone who swims every day, have always liked the swimsuit idea, if the girl kept it on, and just pulled the gusset aside, you would get the added pressure of the elastic on your cock, like you do when you fuck a girl wearing knickers. In the not so distant past, girls didn't bother too much about waxing their bikini line, those days will return. To be honest not interested in a wg, dressing up, not into paid role play.