I always thought it was an odd thing to do, I couldnt possibly imagine doing it, that was until I had my dd, its the most biteable bum on earth, I dont do it often but I do do it, she squeals with laughter.
Assuming its fine and we all do it, whens a good time to stop?
I met a lady at a bbq this year who said she still bites her dd bottom at age 16!!!!!!!!!
I imagine i would have packed it in long before then!