Should "sexuality headcanon" be aliased into "LGBT headcanon"?

As the title says, im wondering if sexuality headcanon should be merged into LGBT headcanon and have it as an alias, since LGBT headcanon has more images under it.
 
Both seem to share the same idea, which is images sowing the artists headcanons for what sexuality/identity a character would be (for example an image of Rainbow Dash that says “I headcanon Rainbow as Transgender and Lesbian”)
 
Thoughts on if it should be aliased/merged, or should both tags remain seperate?

No, if only as those headcanons can be heterosexual too. (assuming anyway, I have not looked)

I think an implication would be more appropriate here.

@Princess Luna  
Ah yeah that might be better