This more for the fun of dating and socialising rather for long-term or serious relationships.
Usually German men do not plan to wed or have any sexual relations with these younger women.
If you do everything for him, he will not try to stop you.
This may surprise some women, but if you order him around, he may find you even more attractive.
Dating a German woman follows the standard rules for dating women; you either impress her, or you do not.