Are Birth Control Pills Inadvertently Contributing To Male Obesity?

Literally all of my exes (bar one) didn't take the pill before having a relationship with me (i'm not married, but I think the same principles apply). They all started so we could get a little more baby protections. I'll take this "study" as a very nice compliment to my atributes.

Btw, I've been living for just under 3 years with my current gf, my BMI is just shy of 20 (i'm naturally very skinny, even if my calorie intake is over 2k/day), 5.5ft and 119 pounds.