I think she got you on the sunfish, but at least that strengthens your argument for the kayak ... it's a yak, not a boat.
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Never got into sailing, as in "wind in the sheets", but went on a sunfish years ago with some work colleagues and was impressed with the simplicity, convenience, and ease of use. Thought about it many times. Who knows? It's small enough to hide in the tack room - she won't go in there---snakes visit there from time to time (once a decade is too often for her).