Candle lighters may dress like the wedding party or sport their own attire. Even so, brides' dads have picked up additional to-dos along the way. In terms of cost contribution, the groom's dad pays for a few major items, notably the rehearsal dinner. It's nice, too, if he checks in with the bride's dad occasionally to offer moral support. Little ladies are the norm, but cute little boys can fill this role, too.
Most flower children sit with their parents after completing their stroll.
He also marries the bride. To make the bride laugh as much as possible. To help the best man plan and pay for the bachelor party. It's also common to have groomsmen do double duty as ushers, leaving their posts in time to process with the rest of the bridal party. They also get to decorate the getaway car, dance with dateless ladies at the reception, and act as a resource for confused guests.