In Sexy Biking Magazine there is an article about two young bicycle entrepreneurs who have rethought the Victorian Bicycle Built for Two.
Their idea was a cradle - type, very long seat for the girl in place of the traditional seat - and an adjustable pad on the cradle for the male biker to sit on.
She gets in and lays back and he straddles her. She is in a comfy cocoon of padding - he is nearby pumping as hard he as can since his seat is so low. He has to pump extra hard to get them both going.
They are basically touching in the groin area - but the nice thing is they can look into each others’ eyes - (very romantic).
Also, she can reach up and massage his butt - when his muscles tense up, (As often happens in biking.) It's a win - win.
It's a very popular new vehicle among young male bikers - and selling like crazy - especially near areas with wooded bike paths.