Coz wanking isn't looked at as gay and it's not like you are f***ing another man and anal pentration ain't meant to be all bad.
I wouldn't though, it would be weird.
you CAN f*** your own arse using many house hold objects; cucumber, candlestick holder, opposite end of bog brush, broomstick etc...... but I think you'd be a f***ing BENNY if you liked it.
For the record, it would depend where I was. If I was at home then I would spit, but if I was having a sneaky one at the back of a vus then I would probably be forced to swallow.