Kylie Jenner and Tyga say they rarely fight.

The 18-year-old reality TV star and the 25-year-old rapper insist they prefer to focus on the ''fun things in life'' and disagreements between them rarely last long.

In a Q&A posted on Kylie's app, Tyga said: ''We disagree sometimes, but we don't really fight,'' and Kylie added: ''If we get mad at each other, we just start laughing.''

Tyga - who has a two-year-old son King Cairo with his former fiancee Blac Chyna - also insisted that the pair try to ignore negativity and just focus on the positives in their lives.

He said: ''As long as you know yourself and you got good people around you and you're passionate about what you do, that's all that matters because at the end of the day, you go to sleep with the people you love, you wake up with the people you love, and you spend your time with the people you love.

''You can't live for other people, you know? You gotta live for yourself and better the people around you and make an impact.''

Kylie said: ''We eat a lot. I've gained like 15 lbs.'' But Tyga insisted, ''That's good man. You gotta live man, it's not that bad for you ... you need junk food, you need stuff like that in your system.''