GM's are sexually driven as part of the primal instinct to procreate. When hormones are raging dressing is/was sexually motivated for many of us. Eventually for most of us this wears off and then it can change to be a way of relaxing or a need to feel right. None of us chose to be TG, it chose us.
If you look on the internet it's mostly about sex and dating. It's not always that way. Most sites about CDing use sex as a way to get people interested and generate web traffic. Many of the senior members here do not dress for sexual pleasure at all. The TS women are not even interested in the clothes for the most part except to blend in with their core gender (female). It's a journey for all us of and we arrive at different destinations for whatever reason. "One size does not fit all".
Again, this is JMO. I'm not a gender therapist.
*disclaimer* I'm not having a light bulb moment. This post is geared towards visitors, and new GG's who may think it's only sexually motivated.
Comments are welcome.