What is this?

Googled it found this on the BBC of all places.

Clitoris
AKA: clit, love bud, love button, nubbin, orchid, ruby rosebud.

So touching a rosebud sounds like a fun time.

I once had the company of lady who teasingly rubbed her vag up and down my legs and chest  during foreplay.  As the action became more heated her lips would open and she would plant wonderous pussy kisses on my legs and chest.  At this stage she would slightly lift away and touch me with just her now erect clitoris.  It was hot as hell and intensely sexy.

sounds like a great time!

I don't know about "rosebud touch" though "rosebud massage" typically refers to a non-penetrative anal massage.

I also have been spent time with a lady friend who enjoyed rubbing her vag up and down parts of my surface anatomy. She enjoyed it as much as I did and referred to her physical response to this as "bringiing the little man in her boat to attention". Quite an image if you think about it!