Hello Olga. I would like to thank you for a courteous and meaningful reply. ( Unfortunately some seem to think, that is appropriate to reply hitting below the belt. 

I do not disregard that an age difference involve possible problems now or in future. But you know, this is not a one sided preference. There are young women, who look for men up to 50. I don't want to say it is right or wrong, but it is a reality. So, as long as there are women searching in this range there will be also men looking for them.

Anyway, in my profile I have stated age range 25 - 35, but interestingly everyone seems to be fixed on the 20 something, whereas my partner could actually be also a women aged 35 (eventually even older, if the chemistry is ok).