So it was only my second time having sex with my boyfriend the other day. While doing it, he keeps on pulling out because he said it was too tight and that his penis felt like being squeezed. Apparently, it was my vagina involuntary clenching. I asked him if it hurt, but he said no, he just gets distracted by it. I was wondering if the clenching is normal? Is there any way I could control them? My boyfriend had previous experiences before, so I'm thinking he should have felt the clenching before if it normally happens even with other girls.