What is the consequence of a defendant's failure to object to the admission of evidence at trial of sexual assault?

Defendant concedes his counsel did not specifically object to the admission of such evidence. Indeed, defense counsel expressly agreed such evidence was relevant and admissible. Defendant may not complain on appeal that evidence was inadmissible on a certain ground if he did not rely on that ground in a timely and specific fashion in the trial court. (See Evid. Code, 353; see also People v. Medina (1995) 11 Cal.4th 694, 729 [failure to object waives claim of error based on Evid. Code, 1101].) Thus, this issue is forfeited on appeal.