Nope! it's the way that dentists treat patients. It's the head in the crotch bit that gets to me, also when his tummy gurgles

.... and you should never feel dizzy on rising, the dentist should raise the chair slowly and advise that you sit still for a while. We get a bib, a pair of glasses, a 'where's Wally' on the ceiling

and if we're lucky, painless treatment!
Talk to the Nurse/Dentist when you next go before you sit down!