As i've noticed for a long time now, any type of wifesharing can have an impact, actually different impacts on the husband's performance as reported by both husbands themselves and their wives. my perception is that most of all there might be psychosomatic reasons behind that. i will try to categorize different types of husbands and their reasons according to my own theory, knowing full-well that in real life every couple's situation is different and not easily put an (appropriate) label on. Just my thougts... (with thetic, non-scientific namings):
Swinger type husband
characteristics
equal or mildly increased libido
about equal sexual performance
reasoning
The husband is confident and feels secure in the relationship and his sexual prowess.
Sharing his wife is merely joint recreational activity, something to enjoy together as a couple.
He understands that everyone is different and there will be men doing a better job and others doing a worse job than him satisfying his wife sexually. However he does not feel like he has to compete, as the wife will probably prefer sex she can have on a regular basis with her husband to occasional sex with others. The experiences made "on the side" also inspire the couple's monogamous sex life and add to their pleasure with each other. They may also lead to an increase in both's libido and therefore to overall better sex with his wife and a stronger marriage bond. - Nothing that would compromise his sexual performance at all.
Stag type wifesharer
characteristics
mildly increased to increased libido
increased sexual performance
reasoning
The husband is confident and feels secure in the relationship and his sexual prowess.
Sharing his wife is more of an active act for the husband who therefore views any sexual satisfaction his wife may receive at least as partly his own merit, even though other men may physically provide that satisfaction. He perceives other males as peers in providing pleasure for his Woman rather than opponents, and does not fear competition. The fact of sharing his wife may lead to an increase in his libido for the extra kinkiness of the type of play "on the side" he, the husband provides and "directs". His high level of self-confidence spurs him to outperform other men with no fear of competition, typically resulting in increased sexual performance with the wife while "reclaiming her" as his own.
"cuck" type wifesharer
characteristics
increased to highly increased libido
decreased sexual performance
reasoning
The hubby may be confident in many aspects of life but definitely not with his own sexual abilities. He may be secure in the relationship or not. There are many different types of "cuck hubbies", with some having quite complex personalities so that breaking down possible reasons in only a few sentences is hard to do. An initiation of this type of wifesharing may be a cheating wife, a wife first bringing up being shared with other men or the cuck himself suggesting such a lifestyle. In any case sharing his wife is more of a passive act. Often a "cuck" may think that his wife's cheating (behind his back) is only a matter of time because he cannot provide sexually what she deserves but others can. Sharing her is a means to forestall her cheating in a manner that allows him to be a part and (re)gain some sort of control instead of becoming the helpless victim. The "cuck role" may not be the most pleasant (at first) but it is a well-defined role that provides him with a place in his marriage he can assume, in which he can feel secure instead of continuously failing at trying to perform sexually. Often this type of wifesharing is "work in progress" involving a lot of newly made experiences (via the wife), impressions, reassessments, ... that would change the hubby in the way he may progress as a "cuck".
Perhaps i will continue the "discussion" of the "cuck wifesharer" in a subsequent post because (a) ImO it suits this thread best and (b) otherwise this post will become (too) long.
"wittol" type husband
characteristics
low to decreased libido
low to decreased sexual performance
reasoning
The husband feels secure in the relationship and may be content with his sexual skills or not. "Being content" however does not necessarily mean he is well-performing as a lover - often quite the opposite. In some cases he has encountered a decrease in his libido already, maybe due to age (menopausal drop of hormone levels), a health condition, etc. Typically he has become accepting of his low libido and sexual performance (as has his wife). He has a strong bond with her in a foremost romantic-emotional relationship type, where sex is not a defining factor. He is aware of and accepting his wife's higher libido and (out of love) does not want her to miss out on her sexual pleasure. His wife having sex with other men is a convenient, accepted solution. He does not fear of losing her "just because of sex", and he does not view the other men as competitors, much rather a "technical" substitution for what he cannot (and often does not want to) provide for his wife (anymore).
Note that none of the names ("titles") for the different types of (wifesharing) husbands as mentioned above is accurate nor in the same way used in a dictionary or as an adult lifestyle term. Also often those "types" may overlap or cannot be clearly distinguished from one another in real life. Plus, there are additional "types" of relationships, husbands and their reasons not mentioned here.