While some things have stayed the same, many things have changed a great deal. First, there is the issue of sexuality and of promiscuity. Someone who was married in the early 70's, say, might be appalled to hear an otherwise good prospect asking them if they have had an AIDS test. Rather than being an insult, this may well be a sign of a comparatively safe and somewhat practical partner. While the sexual promiscuity of the 1960's is no longer in fashion, it is also more common for the woman to express her sexual preferences, and to make her feelings and wishes known.
Women can and do ask men out, and many even offer to pay.
Most men, while still willing to pay, are appreciative of the woman who offers to pay the tab now and then. Another thing that is different is your body. In case you hadn t noticed, it is older. Especially for those over 40, there may be a use it or lose it component to testosterone and other hormone levels. If you have been sexually inactive for a while, you might need a tune up visit to your doctor, or even a specialist.