OK everyone I think I can explain why China keeps putting male joints on pieces that seem like they shouldn't be.
It is because it makes everything a "dual purpose piece" at least in terms of dabbing and combusting.
Think about it... All you can do with a female joint is combust unless you have adapters. But with a male joint they give you a dome, nail, and female slide then you should be ready to rock regardless of your preference.
Obviously this is not ideal for us who vape but we are the minority and unheard of and or not thought of by many.
I personally got sick of adapters and had a gong made in every size by
@VaPeD&CoNfUsEd but you can solve all you piece problems with only 2 gongs and 1 adapter.
A 14mm male gong, 18mm female gong, and 18/14 low profile reducer is all you need to fit every setup. Think about it...