Yes. A lot of times the wife isn't showing much sexual affection to her husband, period. Look, we all know what happens when guys don't get sex. Especially in a marriage, where it is an expectation of the guy. The lack of sex explains the 50% divorce rate, it explains the 60-70% of guys who tag sideass during their marriage, the 30-some % who are tagging sideass throughout their marriage, the 15-20% of husbands who develop a healthy porn habit, the 10-15% who become dead-soul shells, with half of those drinking themselves to death.
A study in 2000 showed results of 50% of couples reporting sex satisfaction as poor to not very good. You can bet that comes from all the guys in the couples. Only 20% of those couples wanted help - that is the effect of the wife, thinking that no sex is just fine. Here's the kickintheass from the study: the increase in the perceived shittyness of the relationship rose by 2000% after the first birth - from 1% of couples to 20% of couples. That increase is the effect of guys not getting enough sex. The reason it's not 50% is that some of those guys were tagging sideass, and others were developing their porn habit.
Yes, A LOT of wives do not have enough sex