When I was growing up, the etiquette books stated that if one could smell one's own perfume, one is wearing too much.
Get me and my grammar.... 
Eau de Parfum should came in little bottles and have to be tipped out into a cotton bud or onto the tip of a finger and put on the pulse points.
Eau de Toilette should be more dilute (with alcohol) and less intense, that may or may not come in sprays.
It was the eighties when the 'big' perfumes (like Red Door and Poison) came in and the whole place started to start reek.
I am asthmatic and still gasp when I walk into somewhere like Selfridges' perfumery department.
But I love it. 
I love perfume/eau de toilette and wear it every day. Pulse points only.
Strong perfumes (Opium, I'm looking at you) should never be sprayed on with gay abandon.
Squirt a little onto a cotton bud and wipe it onto pulse points.
Honestly, I love Opium but if I spray it onto myself, I'd be declared a health hazard.
For an eau de toilette, I'll risk spraying it onto myself at wrists, inside of elbows, neck, back of my knees etc.
Good perfume with proper ingredients (not the stuff of body sprays and reed diffusers) is a luxury item. We're so used to scented products everywhere from plastic bags to pencils that we sometimes forget that.
Less is more.