Some men and women have offers all the time.
Talking of attractiveness and availability, one of our neighbours, a couple, you have never seen such an attractive pair, stunning, really stunning, I've had friends family etc round, everyone comments on their beauty, male and female.
The ammount of females that have enquired where he works, where he drinks, what hobbies he has, is rediculous as far as I know they are happy and faithful.
As a pp said chemistry can be just meeting someone who is more attractive than yourself, it's hard to resist for some people, they become deluded in their own attractiveness.
So I think as far as people saying old Nigel is faithful for lack of offers, you also get Steve who's too attractive to bother with most women.
I think it's the average lookers that tend to be constantly on the lookout for validation of their looks.