Erections and Massage can occur for a few reasons, most of which are quite normal and nothing to be embarrassed about. Massages promote relaxation and increase blood flow throughout the body. This can sometimes lead to an erection, especially if the individual is particularly relaxed or the massage involves areas that are near sensitive regions. Certain types of physical touch or stimulation might inadvertently stimulate nerves which can lead to an erection. This isn't necessarily sexual; it's just a physical response.