I had a threesome twice before...

Both times I felt one lady seemed a bit more let down,in that she wasnt getting more attention.

Edit:Just to Clarify- first 2 times was with WGs , the 3rd time with my GF was supposed to happen but never did- so im guessing there were some behind the scences drama....hence she my ex now ...lol

First time:

I was getting head from the one while making out like crazy with the other...
because it was such a sensory overload,I blew my load within 5 minutes... but when it came to round 2..the second chick I guess felt intimidated and didnt really participate much.

Second time,

I was having great fun with 2 gals... while I was eating the one out, the other one kept tugging at my dick trying to pull me away...could feel her being more "handsy" on me. But I could really sense some tension building up between the two.

3rd time..was an ex-gf who invited her bff for a threesome, I was super excited and so was my gf at the time, but her friend never pitched..hence it never happened..and in a way im glad it didnt!

Yeah...to bring a threesome into a relationship with your wife/gf...may sound like a good idea at the time..but I feel it might come back to haunt you at a later date.