How long is an average time for a guy to come during sex??

Me and my boyfriend are arguing about this currently I construe it depends on a lot of things. How normally you have sex is a big factor because the longer a guy go without it, the sooner he comes when he have sex. Also, how into it he is, and the position are important. Guys can usually control it somewhat, so it depends if they basically go for the purpose or hold out for awhile. On average, my husband takes in the region of 10 - 15 minutes. Sometimes it's shorter, sometimes longer. It depends on what kind of sex we're have too. A quickie is obviously early.
20 minutes