What do you do in your free time?
The most I like is a sport or a sex. l am watching a television. My first hobby is the sex :)
I do not agree with Kokoro hai.. How can anyone say "The most I like is A sport or A sex. I am watching A television"??
sport, sex and television are non-countable in that sentence. Apart from that, there isn't too much logic in your correction. If you don't have enough language knowledge you shouldn't confuse others by correcting them wrong.
Here my suggestion:
"l like playing sport, or sex a lot and l am watching television.But my preferred hobby is sex."
If you really want to pronounce "sex", you should say like that. Otherwise it's enough just to say "I like sports and watching television. But my favourite hobby is sex." English is an easy and short-sentence-language. It isn't necessary to write things twice.
During my free time, I play a sport or watch TV. But I have an 'unusual hobby' and that is sex.
I like sports and watch tv during my free time. But my preferred activity is sex..
Okay... it's your life anyway..