I have only once had a massage, which was a therapeutic massage in a medical center and very pleasurable. The very pretty lady who did it made no efforts to stay clear of my genitals and I did not complain. When she was working on my thighs and glutes, her finger nails ran repeatedly along my balls and shaft. I was right on the verge of climax when she stopped working that area and moved elsewhere, so I guess that she was watching and feeling the tension in my body to know when I had reached my limit without spraying her table full of semen.