Here we go again. I admit that this subject is getting a little tedious. However, I find people rubber knecking at accidents tedious and yet we still all take a look.
I've taken a look at this guy's profile and he is young, so presumably so is his girlfriend. As a result this is two young people exploring their sexual desires and preferences. Who knows she may really like it in time, if not thats ok too.
Early on in my relationship with my wife, she mentioned to me how she was really turned on by BDSM. I wasn't horrified, but I really didn't think it was for me. However, my wife persivered and we did try. I didn't enjoy it at all, yet we still did it on occasions, I just didn't make a good slave. Should she not have mentioned this to me, or co-orced me into playing her slave. Maybe, maybe not, however, I know had she not, she would have felt unhappy and not entirely sexually fulfilled. At least I tried it. Did this cause confrontation? To some degree yes, she would certainly would have loved it had I loved it too and it pained her that I didn't like it. The point is I may have enjoyed it and had she never asked, she would have been in that state of I wish I had asked, which would have been even worse for her.
What we have to take into account is this guy hasn't even asked his girlfriend to gain, just mentioned what he likes.
13 years