I've been with a few over 40's & they've all swallowed for me I can honestly say I've never had a gf who hasn't swallowed.
I'm in my fourties - I swallow! Love to! But because of whose cum I'm swallowing. When I was younger, I swallowed too, but that was different - I did it to please. But now, with this guy, I do it because it makes me so hot! I'm crazy for the taste of it and I just can't wait to feel his whole huge load gushing out into my mouth!
I find its not so much of an issue of "swallowing" cum or not. There's a lot of women out there who won't let guys cum in their mouth. I personally don't get an extra thrill if a girl "swallows" vs spits it out. Its the cumming in their mouth thats the good part. But the last few women I've dated seriously have all swallowed which makes it a lot more convenient for blowjobs at work and in the car. I will confess that I wanted to see if my cum is nasty so I had my girlfriend snowball me and it turns out swallowing a mouthfull of my cum at least is no big deal at all.
my wife is 50 and always swallows, at sex parties she will often blow 5 or more guys, and always swallows.
Let's just say that my enthusiasm for cunilingus is unaltered by the phase of the moon. (Actually, my wife's enthusiasm for cunnilingus is more altered by the moon than mine is.)
Here's my take, with the ages of the women involved. Bear in mind this is over a 10 year period. 40 no 38 yes 28 yes 29 yes 44 yes 50 no 43 yes 47 yes 37 no 46 yes 41 no 52 yes I don't see a pattern. I think it depends entirely on the woman.