There's really nothing to ponder. Many would love to know what the other they chat with looks like, mostly for meeting purposes and for comparing to the character they chose to represent themselves as. It's also best so one doesn't get the impression you are what you give the envision of being, namely on the gender type & sexual preference. Due to how you portray yourself with your character could give others a certain outlook that would probably make them think that you are a certain way, which can truly be quite the contrary.

If you ever want to know, there is never a need to worry about asking for such. Some may concur while others decline. It all truly depends on how the person goes about wanting to gain such knowledge.