>>52853231It can either feel like nothing or it can feel great. A lot of people recently have been parroting some shit they heard somewhere that it doesn't feel good enough to blow a load to.
Much like most sexual acts which don't involve penetration of some kind it boils down to how good your partner is. If you're straddling someone with small or medium sized breasts and they're just laying there taking it as you thrust you're not going to feel much. There's no pressure and breasts are just mounds of fat unlike the ass which has the advantage of glutes(anyone can easily squeeze their cheeks together without the assistance of hands) and a more naturally "closed in" shape; breasts tend to naturally separate.
Larger breasts(your pic very much related) can apply enough pressure simply due to sheer size and weight so long as the person isn't on their back. If you're pumping between a pair like that you're going to feel it and any amount of inward squeezing is going to enhance the feeling. Bouncing breasts feel like they provide more friction than simply thrusting so having a partner who can keep that going for a few minutes is a big plus. Mentality also plays a big part in it. There are people who can ejaculate simply by having someone blow on their dick. Obviously there's no real stimulation going on there but just the knowledge that someone's mouth is getting that close is enough to set them off. It can not be understated just how much someone's mindset impacts how much pleasure they get from something. Breast lovers are going to get more out of it than ass lovers. People obsessed with anal are going to enjoy it despite there being no muscular contraction beyond the sphincter; it's literally just a tight ring and "hotdog down a hallway" beyond that point whereas vaginal sex stimulates the entire penis at the same time.
TL;DR: Size can help a lot with certain positions but it comes down to having an active partner and their technique. Don't straddle. Love tits.