That's a phrase my kids have heard often from me - although I have a small variation in that I say "Growing old is compulsory - growing up is optional"
Goes with the Matchless G5, pair of Franny Barnett's, trio of BSA Dandy's, James Superswift, AJS lightweight and all the other old iron we fall over whilst trying to build layouts! Could be worse, we could have all the Morris Minors we own in the shed with us too!