Mmm, not quite. I prefer to avoid group relationships where each person is directly involved with each other person; I wouldn't mind if such a situation arose purely out of circumstance, but I dislike it as a deliberately engineered dynamic.

For me, the difference between dating three girls who were only dating me and three girls who were each themselves dating two or three other people is quite small. If anything, I might prefer the latter: being entirely responsible for providing emotional and romantic support for three different people is not easy. Not to mention that those other relationships would probably make the girls I was dating happier, which is a very desirable end all by itself.

It is a little crude but this analogy holds best when the 'hobby' is collecting and mastering the use of sex toys.

I don't know if you've ever dated a woman with a large toy collection, but I think it's really more of a huge benefit than a disadvantage.