Undecided Question

My aunt is trying to force metereosexuality on me?

First of all, I have nothing against meterosexual dudes. It's just that I have this aunt who rambles on about how guys should take care of their skin and whatnot, then she buys me these bottles of seawater for 39.90 even though I reject her idea many times (I have my own soap!). I need a harsher way to tell her off but I don't want to break her heart, I think the reason she is doing this is because I told her to take care of her looks and like herself more AND I'm the one she discusses her choice of fashion with (o_O weird I know).

But I need to let her down gently, she's nice and all but I would rather she spend her money on some food than this cosmetic crap. How do I do that?