Yes, and the worse one is anal at discretion, they'll nearly always say you're too big or as happened to me recently, she is too sore from all the bum fun she'd had with previous punters. Often those 'discretionary' items exist as extras if at all but I've not once paid for extras. I have a view that if a girl charges for extra services then she doesn't really enjoy it so there's not much point. Anal is the perfect example, it's not particularly my thing but its nice when its on the occasional menu. IMHO, the girls who enjoy it do it without extra charge and its not discretionary. I think the one caveat is OWO which won't make a great deal of difference to the WG but you could argue that she was charging for extra risk. A tactic sometimes adopted for bareback but then I wouldn't go near anyone that does bareback anyway. I mentioned to a WG quite recently that I wouldn't pay extra for anal and explained why and got a ranting abusive email back saying she was here for money and did I think she was gonna let some bloke fuck her arse for free, she does it for money not for fun, perhaps making my point entirely. I do try and find girls who enjoy what they do, makes for a happier punt all round.