How is it possible to thrust into someone you find sexy whilst fully erect for such a span of time without blowing one's load? I can't go more than 3 or 4 minutes and after about 1 minute I'm fighting the urge to splurge.

Have they achieved such mastery over their PC muscles and ability to withhold orgasm?

Have they desensitized their dicks?

Do they have such a delayed ejaculatory response that they don't even feel the urge to ejaculate for so long?

Or have they found ways of slowing down the thrusts and changing angles to keep it at bay?

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Edit: this blew up fast (not as fast as I..) so I'm going to throw in a bonus question:

Do you talk about sex (preferences, boundaries, confirmation of consent etc) before having sex with someone new? Whenever I try it seems to kill the mood, but I'd rather go into it with an idea of what they're into, If nothing else the sex will be better. So how should I go about it without killing the mood?