Alternative suggestions are that it is a dominant behaviour akin to BDSM role play whereby the submissive is punished and humiliated in a similar way as if they were urinating upon them.
Some men and women have sexual fantasies about being not only ejaculated upon by one man, but by multiple men. Indeed, they may regularly masturbate while thinking of such a sexual encounter while using their platinum silicone dong or large silicone dildo.
Aside from fantasy, there are those men and women who take it a step further. Indeed, they are liable to get involved in sex clubs for example where they have the environment within which they could potentially be ejaculated upon by many men simultaneously.
Within this orgy environment the person receiving the ejaculate may be perceiving it as a humiliating experience which they are getting off on because they have sadistic tendencies.
Alternatively, some men and women see this act as highly empowering because they have the focus and attention of many men at the same time and they are receiving their ‘seed’ which they may attribute to be full of positive energy and strength. Indeed, in some tribes those adults receiving a man’s cum is a spiritual ritual and blessing.
There are also those men who actively seek to be in an environment whereby they can ejaculate alongside other sex toy loving men upon a willing man or woman. The men who ejaculate find the act aside other men, highly erotic and stimulating whereby their sadist tenancies can be expressed.