No I wouldn't think about it because it doesn't really matter

we males can be a bit insecure sometimes. A few years ago a group of us (guys) had a prank, you'd go up to a guy, who was (occasionally) a friend, (Most often) an acquaintance or (rarely) a stranger and say something like - hey close your eyes, now picture this, me balls deep in your girlfriend. The responses, yeah you had guys that flipped out, most calmed down, even laughed after learning it was a game (think, I/we didn't even know if you had a gf, and if you did, had never met her) but you still had that guy who for the hours after would glance at you wherever you were in the room. Then you had those cool as f**k guys, a friend now and this is how we met, he didn't even flinch, sipped his brew then said, (clean version) mate, I'll give you my keys and pay you if you'll do it right now because she nags me every single day for sex, he was and still is a dude and a very secure guy. Another was a guy that said something like he be happy if I did because she had not wanted it since Will Smith was the Fresh Prince of Bel Air.
Me, my answer to the question would be - yeah her call, but I'd be sort of scratching my head if she wanted the same or smaller. The exception to that is if it was some freaky kinda thing like with a midget