SPH is in some ways a way for the smaller or average sized men to derive some pleasure, or a way to cope with, having a modest endowment in a society that constantly measures the masculinity of a man by how many inches are in his pants. I don't believe that's what makes a man of course, but it is SOCIETY that has ingrained this 'size matters' mentality into our collective psyches. Just by that measure, men who don't measure up are being poked fun at anyways everytime that saying is referenced, i.e TV shows, movies, book, or on a t-shirt.
There are many men who enjoy this for a variety of reasons. You have men who are CEO's of major corporations who may be modestly endowed, and enjoy the idea of being in a position where they AREN'T in control. You have guys who have had women tell them straight up that they don't measure up, or compared them with larger lovers for the sake of it. SPH is almost a defense mechanism of sorts, and a way to turn the societal pressures of having a big cock on its ear, by accepting that you're small, and using that as a way to gain some psychological satisfaction in a situation where you the chances of you satisfying a woman, and yourself, from a physical standpoint is perhaps lessened by not having the size to do s
f course technique is a large part of sex, but let's be real: a man with a 3-4 inch penis and thin is not likely to cause enough friction in a woman's pussy for technique to even matter.
As hard as this may be to understand, it's almost taking a 'negative' and turning it into a positive. You wonder now how does being humiliated for having something beyond your control have any silver linings? Well the way I look at it is, as far as penis sizes go, in a sexual encounter the most memorable cocks (for different reasons of course) are small and big ones. Average is ,well, average... not really remarkable enough in any way to stick in the mind.
Having a small cock, as much as it is maligned in society, would be memorable to the other person, and instead of bowing to the pressure of being big, it's almost a reverse-admiration of sorts, BUT at the very least your size is being recognized on some level. What many fail to realize is that for most who are willing SPH participants, we otherwise harbor no feelings of inferiority, which many who don't understand the fetish seem to believe we do.