How does my bj last so long?

People have been messaging me asking how my bf lasts so long when I give him head. lol
Well, at first he came much quicker, always right when I was getting into it, so I told him he'd probably have to train his cock a bit lol.. so our first few weeks after we started hanging out I would spend like 5 or 6 days at his house in a row and spend literally the entire day between his legs in his bed with him giving him head. It worked out because he was not working for a couple months during that period... I'd spend the day with him like that and After he'd cum I'd tell him "I want more, please tell me when I can have another load please" as sexy as I could lol-- and I'd just lie with him for a little bit kissing his cock for a little while until he started getting a boner again, usually after maybe 15min or so, and then go for another blowjob , and a third and so on-- and I'd just keep doing that and try and make him last longer.- I'd probably do it until his cum started turning a little bit clear.. and slowly as time went on he started lasting longer and I guess after about 2 months or so of that he could last as long as I wanted : )

To celebrate him 'graduating' I handed him an egg timer and set it for 80 minutes and gave him an hour+ long half, intense, hot, throating, sloppy blowjob, and he literally came the biggest load I think he ever gave me all over my face lol

hehe, he just reminded me that when I started his little training sess thing we actually weren't even official dating yet, but we'd been hanging out and I had been giving him head for a couple weeks at that point but somewhere in the middle he asked me to be his girlfriend lol, and I told him I would love that and he said "me too" :P

So, how to last longer? Lots of practice ! :P