this is funny so i have to respond (even tho i have now quit the biz)
to comment on the start up post....i have point blank never liked fingers in me, esp as they all seem to just jab their fingers roughly in and out and its not pleasant whatsoever, also it just makes me wanna go pee, so i just tell them straight out, 'i am really sorry but i dont like fingers in there, only cock! and i prefer fingers 'gently' on my outer bits'.....and then if they give too much full on attention to my clit, i say 'it's really sensitive so you have to back off and pay attention to other areas then come back to it later'....and if they continue as if they havent heard me, then i just say 'i'm really sorry but it's really too sensitive now, how about a blow job?'
i have never minded guys going down on me, i find it one of the perks of the job to be honest. also i have been lucky and had some really great lickers who have made me cum (which is a miracle as i am notoriously hard to orgasm)...men seek what they cant get at home, right? i have had confirmation of this as well by the things the guys say to me. I think it is really lovely that guys want to 'give'....i mean they are paying us, and you'd think they'd just want to be 'serviced' yet the majority are hell bent on giving us a great time, by doing what they think we want, which is what we keep bleating on about in all the magazines etc: we want more foreplay....as for the ear thing, if you look up erogenous zones, ears and necks are major for a guy, so they do it to us, hoping we will do it for them, (which i dont, it's like licking ass, i just dont want to)
but i have found that there is a fine line between telling people 'ouch dont do that' and humiliating them for life. i not so long ago, when i wasnt an escort, and i was learning about bj's and a guy said to me: 'what the fuck are you doing?' and i was so humiliated i couldnt give another blow job again for years....so you want to be able to say what you want without embarrassing them, cuz it is so easy to get embarrassed....like for instance i am giving a guy a blowjob, he is flinching, i assume its cuz it's great, but no, its cuz he's in pain, his dick is super sensitive, i had no idea, he doesnt want to hurt my feelings, but then he tells me, that he's super sensitive, and i'm like oh no oh god i am so sorry! and then i cant forget it,and then we are all awkward etc etc....so my point is, any thing like this has to be handled really sensitively
good luck!