>>50154644Age and a general lack of cute art or super lewd art that encourages people to overlook it. I used to RP lots of MILFs and I still remember how one of the guys I would typefuck with would look at Tsunade and ask me if she really had to be 53, even though that was her canon age at the time. So it turns people off more than you'd think. But also, she's from the E4 in the XY games. The E4 almost never get any attention because they're at the back end of the games and you only interact with them for a very very limited amount of time.