Got bit of a question /b/.

I get bored during sex, thats it.
Why the fuck does this happen to me?
Anyone here with the same problem?

I tend to get tired of fucking her pussy after 10 minutes of being at it, and cuming takes me forever no matter what ( like i really gotta focus on fucking her at 10 penetrations per second hitting it like a train or sthng to get there and sometimes not even like that i'll get to finish)

It hasn't been with a girl in particular. No they are not ugly cunts (8+).

Also my dick tends to get quite numb after a while (maybe shit just lasts for too long for the poor lil me).

Take this seriously, thanks ( and yes i'm considering a somewhat possible bisexuality, guy on guy porn disgusts me tho).

Sorry for the huge question, could've made it shorter ikr.