Do You Know Mrs AppleBlossom

A man sits in a bar, reading a newspaper. Suddenly he is tapped on his shoulder by another man:
- ’Excuse me sir, but do you know Mrs. Appleblossom?’

the man folds up his newspaper, coughs slightly and replies:
- ’just a moment sir’, after which he takes out a little black notebook. ’A, A, A... [finding the name in the book] yes, actually I do know Mrs. Appleblossom’.

He puts the notebook back into his inside pocket picks up the newspaper and continues reading. The other man taps his shoulder again:
- ’Excuse me sir, but have you been to bed with Mrs. Appleblossom?’

The first gent puts the newspaper down again, finds his notebook and checks:
- ’B, B, B... ahh, yes, I have been to bed with Mrs. Appleblossom’

He starts putting the notebook away when he once again is tapped on the shoulder:
- ’Excuse me sir, but I am Mr. Appleblossom, and I am very disappointed’

- ’D, D, D... ahh... yes sir, so was I!’