No, please don't do this.
A single simper can be enough to wreck a huge and passionate relationship:
'What do you want Rhett?'
'I'll tell you, Scarlett O'Hara, if you'll take that Southern-belle simper off your face. Someday, I want you to say to me the words I heard you say to Ashley Wilkes. I love you Scarlett...'
Simpering is for the self-important, the pompous and the patronising. That is, utter, utter fools.
Really, it'll do you no good. A simperer reeks of falsity and self-centredness. You can suss out a simperer in a second.
If you're not blind, probably even faster.
Thing Not To Do Today: simper. This word arrived in English in the 1500s. It's quite like the Middle Dutch zimperlijc, which means elegant, but there's a Danish dialect word simper which means affected or coy.