I highlighted part of this response.....100% exactly correct.For some, it may be the only way (if hubby is truely a cuckold, or is in a FLM) they get enjoy their wife or GF. This is the most arousing orgasm a man can have, and a sexy wife can exploit it to great advantage - with an all too willing husband!
On the other hand....It doesn't need to be a "cuck" scenario at all - mfm threesomes are a great way to provide our wives with very satisfying sex and for us to enjoy seconds without threat to our marriage. I was lucky to find that my wife loved giving me seconds as much as I enjoyed being in her that way, and because hubby will be there the wife may feel more secure inviting another man into the marital bed.
Threesomes are an excellent way to move into "sharing" one another.
We get with a guy friend. My pretty conservative wife REALLY gets into the sex fun. We take turns with her, we each do her twice then they go one more befor he leaves. There's been nights I've done 3 and he did 4. It's not like she goes crazy like a fake porn vid but she very obviously loves the sex with him and me. She gets REALLY turned on. She absolutely LOVES the mess. She'll say many times throughout our fun things like...can you hear it?...referring to the slosh slosh while she gets pumped. And yes it's SLICK in there but it's all fun.
She's horny as hell for days after so our sex life is pretty acttive.