Please excuse my silly fellow posters. I will help with a sensible reply, as I'm well known to be the most serious punter on this forum.
1. Deep throat is always included but gagging is extra. Bad luck, your name will cost you more money.
2. Oral and sex are free provided you perform them alone, outside the girl's house before you go in.
3. The money you pay her is for time and companionship, please hand over your watch and large boat.
4. At discretion means she keeps an imbecile in her cupboard who will do these acts (prossie-speak for dis-cretin).
For further help please go to www.IWillNotTakePeopleForIdiots.com