I can't say I've heard of anybody getting turned on from hand holding, but it doesn't strike me as odd either. It's a new guy that you're really attracted to. Your hormones are going to be on overdrive and a lot of things could get you going.
“This planet has - or rather had - a problem, which was this: most of the people living on it were unhappy for pretty much of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movement of small green pieces of paper, which was odd because on the whole it wasn't the small green pieces of paper that were unhappy.” ― Douglas Adams, The Hitchhiker's Guide to the Galaxy