Guy's Behavior

Why do guys you sleep with either avoid or go quiet when talking about other guys?

**** BEFORE I START, YES I KNOW I'VE MADE MISGUIDED JUDGEMENTS, BUT HEY THATS PART OF LIFE, WE ALL DO THINGS WE REGRET OR KNOW WE SHOULDN'T HAVE DONE... SO PLEASE NO HATE, I JUST WANT ADVICE OR OPINION IF YOU WERE IN THE GUYS SHOES.. THANK YOU :) ****

So on 2 separate occasions this week my past sex life has come up with 2 previous sexual partners in the room and they both showed the same reaction... silence.

The first guy I slept with once and we later both realised that we were better off friends, anyway him and girlfriend invited me to their place and i was talking to the girlfriend (who knows about our one night) and a guy got brought up in the convo and she was laughing and talking and he went silent, i just assumed he was just listening or zoning on the movie so i didn't care so much... BUT it happened again last night with another guy i slept with.

The second guy is a co-worker.. (yes i know, don't sleep with your co-workers, I blame alcohol and mutual attraction) Anyway him, myself and another co-worker were talking about sex, i don't know why, but the guy i slept with was asking all these questions to the other coworker, when mine got brought up, again silence..

Is this a territorial thing? is it some lingering feelings? what is your opinion on this?

Why do guys you sleep with either avoid or go quiet when talking about other guys?
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