1) He is very linked to and passionate about something you enjoy and appreciate, so his voice is subliminally linked in your mind with happiness and something you're attracted to.
2) He is more than decently fit.
3) Pretty-much every picture I've ever seen of him, he has worn (apart from winter-jackets) "well-fitted" (i.e. tight, not baggy) shirts. For the viewer's appreciation, doubtless.
You could get one of his shirts too, here
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