Can you opt out of classmates doing physicals on you?

I heard from a 4th year that when we learn PEs in first year, we pair up with a same-sex classmate and do them on each other. Basically I am uncomfortable with this and dread having even physicians examine me (and don't even consent to allowing midlevels to do so) so the thought of a classmate doing so is horrifying. Basically I had back acne and it has subsided but it left a lot of keloid scars on my entire back. I really don't want to "suck it up" but I'm not sure if somehow I signed or... Can you opt out of classmates doing physicals on you?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums