Getting Intimate...with the girlfriend?

Ok so i recently had sex with my girlfriend and i was wondering a couple things. When she gives me handjobs she can get my to *** (fairly quickley :( dont have good self control). But the other day when we had sex i didnt ***...? Is there a reason behind that and y?





And if u have any opinions on how to last longer or things i can do would love to hear them.





Thanks