that happened to me once (ok, ok, more than once, but in this specific instance):
i was with a brand new date, once i had never had a session with before (we had met at a meet & greet and had previously been in email contact working towards getting together).
it was great, she was beautiful, i was having the time of my life.
but...
as we lay on the bed the old magic dragon just wasn't getting into his full attentive position.
the great thing this lady did, without commenting without saying a word, without anything at all, she lay back on her back on the bed, spread her legs and began masturbating.
she writhed very erotically, and eventually came to a big O. it was a joyous sight to behold.
i have since seen her more than any other provider i have seen. she is one of my atfs. and the old magic dragon has gotten much much better at doing his job with her (just saw her last week, she loved riding the dragon).