Tasting yourself (for women)

DH has this recent obsession about me giving him oral after we've made love.  I try not to be a prude but the thought of tasting "myself" doesn't appeal to me.

My question is how common is this?  I'm not interested in whether you think I am right or wrong, because that is for each to decide on their own, I am just interested in seeing what the consensus is on this issue.