My brother came home from shopping the other day with a really nice floral shirt from Topman. He was a bit worried that it was too feminine as it's in pale pastel tones, but I told him it would be fine as long as he wears the right things with it. A floral shirt on a man needs to be buttoned right to the top, the collar looking sharp and the sleeves rolled up. This will create a fashion conscious look rather than your dad on holiday! I would avoid short-shorts and instead go for chinos or skinny jeans, add a pair of smart chelsea boots and some sunnys to seal the deal. The best advice I can give you is to steer clear of Hawaiian prints! Never a good look lads!