I'll post this in this quiet little corner of the universe. One reason I relate to ISFP has to do with the way I am with intimacy. I think possibly other ISFPs could relate based on what I know about the generalized theory of the type.
Being a Fi- dom I care a lot about meaningful intimacy and values. I can't just go around reckless with sexuality. It's not an option for me to be intimate with strangers, acquaintances, or people I'm not in love with. However, unlike Si which can internalize sensory experiences, I need to actually experience something to get the benefit of it, so can't go along with an idea of sexuality. For example, I've noticed Si people I'm close to will have an idea of nature that is part of their identity, and they may paint pictures of it, or talk about it, read books about it, watch shows, dream about it, or even live in nature, but never go outside. There is a concept of it that satisfies them without literally experiencing it and their sexuality can be the same (or it may be iNtuitition or something else). My point is that I'm not like that because I have a need to feel, smell, see, and hear it, literally in the moment, or it isn't the same experience at all, and it seems like that could be Se-related. There needs to be something new about it - something that has never been before and without that sense of discovery in the moment, there is a lack of life and energy to it. Sexuality is like that, so a lack of it is very much an absence that can't be recreated.
This combination of needing meaning with intimacy combined with needing the literal expression of it makes the experience somewhat out of personal control. It leaves a person destined to a painful life. I'm a bit extreme in all of those parameters because I've only been with partners I thought I would grow old with and love forever, but they never needed the literal expression of it the same way as me because they were abstract about it. Abstract love is hard for me as well - like I enjoy intellectual conversations or activities that could represent intimacy, but it isn't the same as fully experiencing the other person. It has caused a bit of a lonely life for me. So now I bellydance because that is the most autonomous expression of sensuality that I can determine for myself.