I’ve been lucky enough to have several legit massages turn sensual or erotic. This happened a few times in SF and Las Vegas at high end legit spas as well as at home using Zeel. Similar to what others reported here, I do a few things—keep my hands on the edge of the massage bed for the anticipated crotch grazing, get hard on the table without trying to hide it, and I also make sure to point my cock down between my legs so that he might graze my balls or cock while he massages my inner thighs. From there, I’ve had hand jobs/HE, blow jobs and occasionally oral and lots of mutual touching.