I've also woundered about this.. Thanks for the advice..

Yeah, if you cum quickly, do a quick one before going over.

I had a sex buddy who was sooo wonderful in bed. He would always visit one of those 25 cent viewing booths, get his rocks off, then come over. lol. But he lasted and we had lots of time for the build up, kissing, licking, etc. Once we got down to business, he could last plenty long enough to please us both. Worked for us!

I'd say it depends on you. How fast do you usually orgasm? If you reach orgasm quickly then masturbating a little while before sex should slow you down some. If you don't orgasm quickly then I wouldn't worry about it.

Both my aunt and older sister suggested to me as a teen to jack my partner off as part of foreplay. It slowed young men down and helped me get what I needed. They were always able to perform. Now, older, I do not do that as recovery time is longer.

If she won't do it for you, do it. Might ask her to see how many times she can bring you some evening.

I wouldn't. It generally takes longer (especially if you're older) to get another erection.