Kopi Jantan

Near my place, there's this Halal coffeeshop, beside the normal coffee which they sell at $1 a cup, they also sell packet coffee, which i saw is called Kopi Jantan, i ever tried the Kopi Jantan @ $1.50 a cup and find that i like it, usually it's a young lady who man the counter, then there's a day, i was there and this round, it's an older lady who is manning the counter, i told her, i want a cup of Kopi Jantan, she reply me, Kopi Jantan is for Jantan to drink, are you sure you want it, i reply yes, she look at me.  Maybe she must be thinking, i am a female, why want to drink Kopi Jantan, haha....