Does eating lots of garlic and wearing lavender keep away mosquitoes?

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I would say that my dad and brother always get really badly bitten by mosquitoes when we go on holiday. Does eating lots of garlic really help keep away blood suckers like mosquitoes or is it a myth? I would eat garlic and onions with almost every meal I have or make at any rate as I love strong flavors and I would dose myself with lavender bubble bath and such just because I love the smell and it helps me sleep, but do these life habits deter the bugs or do the bugs just prefer my brother and dads blood better than mine? Does alcohol like wine and beer also attract bugs at night as I don't really drink and they usually do a lot on holiday too.